Answer:
5 : 4
Explanation:
It needs to be the same ratio as the corresponding sides given.
- 5 corresponds to 4
- 4 corresponds to 3.2
Hence
![(5)/(4)=1.25](https://img.qammunity.org/2020/formulas/mathematics/high-school/upscl1tda6bu5nn2jp83xuem41fo7zbwfa.png)
Also,
![(4)/(3.2)=1.25](https://img.qammunity.org/2020/formulas/mathematics/high-school/fs4s46k29fbwwl52i2291utjufn73lp2v2.png)
So x is to y should also be 1.25
1.25 can be written in fraction as
![1.25=(125)/(100)=(5)/(4)](https://img.qammunity.org/2020/formulas/mathematics/high-school/unw21xofntp49160dv7a5sdds0rs3i8ag9.png)
The last choice 5:4 is the correct answer.