To check whether the given numbers are in proportion or not, we need to compare the ratios of consecutive numbers.

The given numbers are: 2, 7/2, 3, 9/2

To compare the ratios, we can divide each number by its preceding number:

7/2 ÷ 2 = 7/4 3 ÷ (7/2) = 6/7 (9/2) ÷ 3 = 3/2

If the ratios are equal, then the numbers are in proportion. Let’s compare the ratios:

7/4 ≠ 6/7 ≠ 3/2

Since the ratios are not equal, the given numbers are not in proportion.