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Finding the Fourth Proportional to 420,966.66, 580,960.80 and 239,694.42

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Solution

The fourth proportional to 420,966.66, 580,960.80 and 239,694.42 is: 330,793.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,966.66 : 580,960.80 = 239,694.42 : x
  2. Step 2: Convert to fraction form
    420,966.66/580,960.80 = 239,694.42/x
  3. Step 3: Cross multiply
    420,966.66x = 580,960.80 × 239,694.42
  4. Step 4: Simplify right side
    420,966.66x = 139,253,061,998.74
  5. Step 5: Solve for x
    x = 139,253,061,998.74/420,966.66
  6. Step 6: Final answer
    x = 330,793.56

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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.