Fitzwilliam was asked to draw two squares with the ratio of sides $2:5$.
As you can see, each side of the original square is $1$ unit, and each side of the new square is $2.5$ units.
Can you find a way that Fitzwilliam may have enlarged his squares?
$\array{ 1\\ \ \ \ \bbox[lightgreen, 4px, border:3px green] {\phantom{\int x}}\ \ 1 }$ $\array{ 2.5\\ \qquad \bbox[lightgreen, 30px, border:3px green] {\phantom{\int x}}\ \ 2.5 }$

Fitzwilliam multiplied each side by $2.5$, or $\frac{5}{2}$, in order to enlarge his square.
Do you think this will work for your rectangles?
Make sure your drawings are neat!