Floated elements of variable height push siblings down

I have 6 elements which should result in two rows of 3 elements each, so I've floated them. But the content of the elements varies quite a bit, and the layout breaks when one taller element prevents subsequent siblings from floating all the way left:

Here is example CSS:

figure { width: 30%; float: left; margin-left: 1%; font-size: small; outline: solid #999 1px; }
img { max-width: 100%; }

and HTML:

<figure>
  <img src="http://placekitten.com/150/200?image=1" alt="Kitten 1" />
  <figcaption>Bacon ipsum dolor sit amet short ribs pork chop pork belly spare ribs shoulder tri-tip beef ribs turkey brisket short loin tenderloin ground round. </figcaption>
</figure>
<figure>
  <img src="http://placekitten.com/150/200?image=2" alt="Kitten 2" />
  <figcaption>Short ribs cow corned beef, beef tenderloin swine biltong short loin. </figcaption>
</figure>
<figure>
  <img src="http://placekitten.com/150/200?image=3" alt="Kitten 3" />
  <figcaption>Boudin chuck ground round, pig pastrami salami turkey ham hock beef ribs tongue. </figcaption>
</figure>
<figure>
  <img src="http://placekitten.com/150/200?image=4" alt="Kitten 4" />
  <figcaption>Tri-tip pork loin tongue corned beef shankle ball tip. </figcaption>
</figure>
<figure>
  <img src="http://placekitten.com/150/200?image=5" alt="Kitten 5" />
  <figcaption>Turkey swine tenderloin spare ribs sausage filet mignon hamburger. Leberkas andouille prosciutto, bresaola tri-tip short loin meatloaf shank pig shoulder spare ribs ribeye. </figcaption>
</figure>
<figure>
  <img src="http://placekitten.com/150/200?image=6" alt="Kitten 6" />
  <figcaption>Pastrami andouille tongue tri-tip jerky.</figcaption>
</figure>

And an example JSFiddle: http://jsfiddle.net/KatieK/5Upbt/

How can I get second row of figure elements to line up below the first 3 elements?

HTML/CSS solutions are preferable to JavaScript / jQuery solutions.

Solution 1:

How about a CSS only solution? Add this rule:

figure:nth-of-type(3n+1) {
    clear:left;
}

jsFiddle example

Solution 2:

You can use the :nth-child pseudo class to clear every fourth element.

figure:nth-child(4n){clear: left;}

EDIT:

4n doesn't quite cut it. 3n + 1 is what you want.

figure:nth-child(3n + 1){clear: left;}

http://jsfiddle.net/jMCng/1/

Solution 3:

Here is a solution I tested: http://jsfiddle.net/5Upbt/7/

I modify your figure style

figure { display: inline-block; vertical-align: top; width: 30%; margin-left: 1%; font-size: small; outline: solid #999 1px; }

This is based on the more general solution here: http://jsfiddle.net/bazmegakapa/Ft9d2/