Using Area Driven Relation to Control Dimension

I am wondering if there is a way to control a dimension such that the area of the sketch will be a given value. What I am trying to do is control one sketch based on a height diemsion and the area of a different sketch. I have one sketch that I modify. Then a second sketch that has locked dimensions besides height is meant to be 2 times the area and I currently just modify height until I get it to be what I want it to be. I am trying to automate that process,

Thanks,

Brad