If the ratio of the orbital distance of two planets $\frac{d_1}{d_2}=2,$ what is the ratio of gravitational field experienced by these two planets ?

Ratio of orbital distance of two planets $\frac{d_1}{d_2}=2$ ratio of gravitational field distance of two planets  $\frac{E_1}{E_2}=?$

$\begin{array}{l}E=\frac{Gm}{x^2}\therefore E_1=\frac{GM}{d_1^2};E_2=\frac{GM}{d_2^2}\\ \therefore \frac{E_1}{E_2}=\frac{GM}{d_1^2}\times \frac{d_2^2}{GM}\\ \frac{E_1}{E_2}={\left(\frac{d_2}{d_1}\right)}^2\\ \because \frac{d_1}{d_2}=2\left(given\right);\therefore \frac{d_2}{d_1}=\frac{1}{2}\\ \therefore \frac{E_1}{E_2}={\left(\frac{d_2}{d_1}\right)}^2={\left(\frac{1}{2}\right)}^2\\ \therefore \frac{E_1}{E_2}=\frac{1}{4};E_2=4E_1\end{array}$