Newtons Law of Gravitation

Homework Statement

What is the ratio of the gravitationalpull of the sun on the moon to that of the earth on the moon?(Assume the distance of the moon from the suncan be approximated by the distance of the earth from the sun.)

Homework Equations

F$$_{g}$$ = (Gm$$_{1}$$m$$_{2}$$)/r^{2}

The Attempt at a Solution

What i got from the question the surface to surface distance is the same and to calculate F_{g} so using the orbital distance of the earth from moon i found out theorbital disrance of sun to moon but my answer s totally different from the aI am to get

Thanks for any help possible