Out of the given figures, figure IV does not follow the same trend as the others.

To determine this, we need to compare the patterns or characteristics of each figure.

In option 1, figure I shows a gradual increase in size from left to right.

In option 2, figure II also shows a gradual increase in size from left to right, similar to figure I.

In option 3, figure III follows a different pattern where the size remains constant throughout the figure. This is in contrast to figures I and II.

Finally, in option 4, figure IV shows an irregular pattern and does not follow the gradual increase in size seen in the other figures. This deviation makes figure IV the odd one out and does not follow the same trend as the rest.

Hence, the correct answer is option 4.