Write the proportion.
4.5 hours is to 7.5 hours as
3.3 hours is to 5.5 hours
To write a proportion, you simply set two ratios equal to each other. The ratios compare the first quantity to the second in each pair.
For 4.5 hours to 7.5 hours and 3.3 hours to 5.5 hours, the proportion would be:
(4.5 hours / 7.5 hours) = (3.3 hours / 5.5 hours)
Now, if you want to represent this proportion without the units for clarity, it would simply look like this:
4.5 / 7.5 = 3.3 / 5.5
This shows that the ratio of the first pair of numbers (4.5 to 7.5) is equal to the ratio of the second pair of numbers (3.3 to 5.5).