Question

Write proportion 3.6 hours is to 4.8 hours as
3.9 hours is to 5.2 hours

Answer 1

1.3 repeating is the proportion.
3.6 = 3.9
----- -----
4.8 5.2

Answer 2

A proportion for this would be

3.6 : 4.8 = 3.9 : 5.2

That is the correct way to write a proportion formula.