He ANWSER I got would be c idk if this is right or not I honk it might be
Answer:
33.4933333333, rounded, 
4/3x3.14x2x2x2=33.4933333333
5, 10 ,15
divide each by 5
1,2, 3
so the ratios should be 1,2,3
Metal 1 : divide by 150
1,2,4
Metal 2 divide by 130
1,2,3
Metal 3 divide by 310
1,2,3
Metal 4 divide by 140
1,2,3
Metal 1 is not proportional
Choice A