At 900 K the following reaction has K_p = 0.411:

2 SO_{2 (g)} + O_{2 (g)} <--> 2 SO_{3 (g)}

In an equilibrium mixture the partial pressure of SO₂ and O₂ are 0.233 atm and 0.357 atm, respectively. What is the equilibrium partial pressure of SO₃ in the mixture?

Round your answers to three significant figures.