Answer:
If there are 55 students in band, then 220 students are in choir.
Explanation:
It is given that the Jackson Middle School has 4 students in choir for every 1 student in band.
![1\text{ student in band}=4\text{ students in choir}](https://img.qammunity.org/2020/formulas/mathematics/high-school/cpw7qhw91ki8beqevcap6uifsfxk7ercpk.png)
Multiply both sides by 55.
![1* 55\text{ student in band}=4* 55\text{ students in choir}](https://img.qammunity.org/2020/formulas/mathematics/high-school/eal27o8nrjjisdbmt1syy22zznpzgqg808.png)
![55\text{ student in band}=220\text{ students in choir}](https://img.qammunity.org/2020/formulas/mathematics/high-school/svqreu6z276xmno4em06ibkvag50i58mfs.png)
Therefore, if there are 55 students in band, then 220 students are in choir.