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Finding the Fourth Proportional to 710,376, 980,318.88 and 392,424

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Solution

The fourth proportional to 710,376, 980,318.88 and 392,424 is: 541,545.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,376 : 980,318.88 = 392,424 : x
  2. Step 2: Convert to fraction form
    710,376/980,318.88 = 392,424/x
  3. Step 3: Cross multiply
    710,376x = 980,318.88 × 392,424
  4. Step 4: Simplify right side
    710,376x = 384,700,656,165.12
  5. Step 5: Solve for x
    x = 384,700,656,165.12/710,376
  6. Step 6: Final answer
    x = 541,545.12

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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.