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Finding the Fourth Proportional to 667,697.28, 921,414.40 and 361,767.68

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Solution

The fourth proportional to 667,697.28, 921,414.40 and 361,767.68 is: 499,235.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,697.28 : 921,414.40 = 361,767.68 : x
  2. Step 2: Convert to fraction form
    667,697.28/921,414.40 = 361,767.68/x
  3. Step 3: Cross multiply
    667,697.28x = 921,414.40 × 361,767.68
  4. Step 4: Simplify right side
    667,697.28x = 333,337,949,806.59
  5. Step 5: Solve for x
    x = 333,337,949,806.59/667,697.28
  6. Step 6: Final answer
    x = 499,235.15

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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.