Determine if 22, 33, 42, 63 are in proportion.

The correct answer is Yes

22:33 = $\dfrac{22}{33}$ = $\dfrac{2}{3}$

42:63 = $\dfrac{42}{63}$ = $\dfrac{2}{3}$

∴ 22:33 = 42:63

Hence 22, 33, 42, 63 are in proportion.