Adjust Image Width

On the home page we have a featured listing section. There are 4 pictures of homes that rotate. The image of the homes does go all the way across to the right side of the frame. I’m sure this is just a css issue. Hope you can help me adjust so each image of the houses goes across all the way across to the right side of the frame. I have attached a pic just in case. http://www.randykassebaum.com