Yes you can do this. You’ll need to go into your css file and look around line 1245 (unless you’ve made changes) for this –
.welcome-feature-1, .welcome-feature-2 {
background: none repeat scroll 0 0 red;
float: left;
margin: 0 2% 0 0;
width: 32%;
}
^ Just change the width to a lower number….then look under that code for the .welcome-feature-3 and adjust the width to a higher percentage. Just play with the numbers until you get the size exactly as you want it to look and that will give you exactly what you’re looking for.