Explanation:

- The series starts at 30.

- Dividing 30 by 2 gives 15.

- The next number is also 15.

- Dividing 15 by 2 gives 7.5, but the series has 22.5 here, not following the pattern.

- Each number should logically result from an operation on the previous one.

- Continuing the pattern would lead to 15 multiplied by 1.5 resulting in 22.5 (logical progression).

- Then, 22.5 should logically proceed to 33.75 by multiplying with 1.5, not to 46.

- 46 breaks the multiplier of preceding number logic.

Option 1: 46 is the number that does not fit.