Who knows this?!???

Answer:
5 : 4
Step-by-step explanation:
It needs to be the same ratio as the corresponding sides given.
Hence [tex]\frac{5}{4}=1.25[/tex]
Also, [tex]\frac{4}{3.2}=1.25[/tex]
So x is to y should also be 1.25
1.25 can be written in fraction as [tex]1.25=\frac{125}{100}=\frac{5}{4}[/tex]
The last choice 5:4 is the correct answer.