The radius of a sphere and that of the base of a cylinder are equal. The ratio of the radius of the base of the cylinder and the height of the cylinder is 3 ∶ 4. What is the ratio of the volume of the sphere to that of the cylinder?
1
27 ∶ 64
2
1 ∶ 2
3
1 ∶ 1
4
9 ∶ 16