Determine if 32, 48, 70, 210 are in proportion.

The correct answer is No

32:48 = $\dfrac{32}{48}$ = $\dfrac{2}{3}$

70:210 = $\dfrac{70}{210}$ = $\dfrac{1}{3}$

∴ 32:48 ≠ 70:210

Hence 32, 48, 70, 210 are not in proportion.