If I'm correct you should make a fraction first
5.4 3.6
----- to -----
4.8 ?
Now find the missing number
5.4 to 3.6 would be a difference of ÷ 1.5 so you must do the same for 4.8
÷1.5
5.4 3.6
----- to -----
4.8 3.2
÷1.5
The tail length should be 3.2 feet
