>I try:
>

>.Container
>{}
>.Item
>{
>   float:left;
>   vertical-align: top;
>}
>.Item2
>{
>   display: block;
>   margin-left: 20%;
>}
>

What I meant is something like this:

http://johnstonianera.com/demos/simpleResponsiveLayouts/right-fluid.html

This is pretty much standard as how a right column supposed to work. In that page, they used an approach of absolute positioning to achieve that. I need to be away from that. inline-table is what I would like to preserve and not be forced to enter a specific width for the right either as a pixel value or as a percentage value.