Radius / cm 0.5 1.5 2 perimeter / cm 3.14 6.28 9.42 12.56 select the proportion of two groups in the table above

Radius / cm 0.5 1.5 2 perimeter / cm 3.14 6.28 9.42 12.56 select the proportion of two groups in the table above


0.5/1=3.14/6.28
1.5/9.24=2/12.56