Area Under The Curves Part 1

For a > 0, let the curves C1:y2=ax and C2:x2=ay intersect at origin O and a point P. Let the line x = b(0 < b < a) intersect the chord OP and the x-axis at points Q and R, respectively. If the line x=b bisects the area bounded by the curves, C1 and C2, and the area of ΔOQR=

1

2

, then 'a' satisfies the equation