Divi builder equalize column heights

I am using divi builder to create a website. I have a row with 3 columns and each column with images of varying size. I need to display the images in a row equal in their heights despite their original size. It seems the equalize heights is not working on images and the images display up and down(ie., original size). I tried defining CSS to display as block still the images were not appearing as same heights.
Can anyone help me with this?