Hello There,
Thanks for providing the information. Please make sure that your image is of the same size. It should be the same dimension like 200×300 in pixels. Because if they are not and you’d want to make them the same dimension, it may be possible but it will look stretch out. In your current setup you may use a 3 custom column like 2/5 + 1/5 + 2/5 and add an inline css for both image element. In the style field of each image element, you can insert min-width: 460px;max-width: 460px; and make sure that each column have it aligned at the center.
Hope this make sense.