Home / 420,849.92-580,749.36-239,606.12

Finding the Fourth Proportional to 420,849.92, 580,749.36 and 239,606.12

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Solution

The fourth proportional to 420,849.92, 580,749.36 and 239,606.12 is: 330,643.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,849.92 : 580,749.36 = 239,606.12 : x
  2. Step 2: Convert to fraction form
    420,849.92/580,749.36 = 239,606.12/x
  3. Step 3: Cross multiply
    420,849.92x = 580,749.36 × 239,606.12
  4. Step 4: Simplify right side
    420,849.92x = 139,151,100,842.08
  5. Step 5: Solve for x
    x = 139,151,100,842.08/420,849.92
  6. Step 6: Final answer
    x = 330,643.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.