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Finding the Fourth Proportional to 675,937, 932,793.90 and 421,288

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Solution

The fourth proportional to 675,937, 932,793.90 and 421,288 is: 581,377.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,937 : 932,793.90 = 421,288 : x
  2. Step 2: Convert to fraction form
    675,937/932,793.90 = 421,288/x
  3. Step 3: Cross multiply
    675,937x = 932,793.90 × 421,288
  4. Step 4: Simplify right side
    675,937x = 392,974,876,543.20
  5. Step 5: Solve for x
    x = 392,974,876,543.20/675,937
  6. Step 6: Final answer
    x = 581,377.96

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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.