Home / 420,989.28-580,957.92-229,997.76

Finding the Fourth Proportional to 420,989.28, 580,957.92 and 229,997.76

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Solution

The fourth proportional to 420,989.28, 580,957.92 and 229,997.76 is: 317,392.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,989.28 : 580,957.92 = 229,997.76 : x
  2. Step 2: Convert to fraction form
    420,989.28/580,957.92 = 229,997.76/x
  3. Step 3: Cross multiply
    420,989.28x = 580,957.92 × 229,997.76
  4. Step 4: Simplify right side
    420,989.28x = 133,619,020,254.26
  5. Step 5: Solve for x
    x = 133,619,020,254.26/420,989.28
  6. Step 6: Final answer
    x = 317,392.93

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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.