Despite my best efforts, I have not been able to align these 4 boxes properly after going through documentation, tutorials, and examples.
div#frontpage{width:100%; }
div#1{width:25%; float:left; position:relative;}
div#2{width:25%; float:left; position:relative;}
div#3{width:25%; float:right; position:relative;}
div#4{width:25%; float:right; position:relative;}
.clear{clear:both;}
<div id="frontpage">
<div id="1">
</div>
<div id"2">
</div>
<div id="3">
</div>
<div id="4">
</div>
<div class="clear">
</div>
</div>
After multiple attempts, this is the closest I have come to achieving the desired result of aligning them all in a straight horizontal row. I opted for percentages over pixels due to the responsive nature of my Wordpress theme.