Print Sizes without Croping

Hi,

My Canon Power Shot SD790 IS images have an aspect ratio of 4/3 and so I can not print 4 x 6 (3/2 aspect ratio) photos without croping. I thought 4/3 was an odd aspect ratio until I found that most other point and shoot cameras are 4/3. Unfortunately Walmart, Fuji, One Hour Photo all print 4 x 6 or other ratios but not 4/3. I have Photoshop but I do not want to edit hundreds of vacation pictures. What I am I missing here? What do you do?
Al