Answer
Breakeven Revenues = $1,728,000 \div 0.4 = $4,320,000
Work Step by Step
Breakeven Revenues = Fixed Costs$ \div $ Contribution Margin Ratio
Contribution Margin Ratio = (Revenues - Variable Costs) $\div $Revenues
Contribution Margin Ratio = (4,000,000 - 2,400,000)$ \div $4,000,000 = 0.4