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Finding the Fourth Proportional to 420,351.76, 580,098.18 and 239,089.78

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Solution

The fourth proportional to 420,351.76, 580,098.18 and 239,089.78 is: 329,951.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,351.76 : 580,098.18 = 239,089.78 : x
  2. Step 2: Convert to fraction form
    420,351.76/580,098.18 = 239,089.78/x
  3. Step 3: Cross multiply
    420,351.76x = 580,098.18 × 239,089.78
  4. Step 4: Simplify right side
    420,351.76x = 138,695,546,234.60
  5. Step 5: Solve for x
    x = 138,695,546,234.60/420,351.76
  6. Step 6: Final answer
    x = 329,951.15

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1.5x scale

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.