According to Vedic astrology, each placement of a planet in a certain house and the aspect it casts on other houses can create different outcomes for the native. In this case, we will focus on Rahu placed in the 7th House for lagna Virgo and its aspect on houses 1, 4, and 9.
When Rahu is placed in the 7th House, it can bring significant changes to the native's relationships and partnerships. Rahu represents unconventional methods, restlessness, and desires while the 7th House governs partnerships, marriage, and open enemies. Hence when these two come together it indicates that natives may experience sudden ups and downs in their relationships.
As per astrological predictions based on this placement for lagna Virgo, individuals may face problems in their marital life due to this malefic placement of Rahu. They might have trouble in finding an ideal partner as well as maintaining their current relationship. There are chances of getting married late or facing disturbances regularly with partners leading to marital disharmony.
On the positive side of this placement represents that natives are likely to have strong communication skills which increase their charm level therefore could attract many potential partners but they should be cautious since such relationships tend not to last long. Moreover getting into business partnership is also beneficent under such cases since natives may gain financial profit through interdependence.
In addition to this placement being unfavorable for marriage prospects, Rahu’s aspect on first house may lead individuals towards self-interest over everything else. You might feel selfish sometimes which won’t resonate well with others hence few disagreements among family members & peers should be expected except if nakshatra lordship differs from what most expected results are since old Tamil scripts mention Onam (Poorva Phalguni) Nakshatra lords don't suffer impacts from Guru & Shani aspect or association but still possible impact of Budha( Mercury)
Furthermore, as Rahu aspects the 4th house, it may trigger uncomfortable changes in familial relationships. There may be disputes regarding property or ancestral wealth, and family members might experience mental disturbances. However, natives may also find themselves acquiring property or assets suddenly with little to no effort which could yield better results for families to unite as well.
Lastly, Rahu’s aspect on 9th House can have a significant impact on an individual's luck and fortune. It is not always unfavorable since positive effects generally tend to show up when lagna lord is placed in third house along with beneficent planets like Jupiter, Venus & Mercury which enhances natives prosperity through overseas travels, higher education leading to any form of enlightenment etc.
Overall, the placement of Rahu in the 7th House with an aspect on houses 1st, 4th and 9th has profound effects on an individual's domestic life, partnerships relations over profit sharing ventures as well as achievements for spirituality & growth. However other planetary placements would need consideration before jumping into a concrete conclusion without proper scrutiny provided by Jyotishi so that man could comprehend and implement useful remedies if necessary.