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Finding the Fourth Proportional to 667,456.38, 921,179.12 and 377,128.03

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Solution

The fourth proportional to 667,456.38, 921,179.12 and 377,128.03 is: 520,487.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,456.38 : 921,179.12 = 377,128.03 : x
  2. Step 2: Convert to fraction form
    667,456.38/921,179.12 = 377,128.03/x
  3. Step 3: Cross multiply
    667,456.38x = 921,179.12 × 377,128.03
  4. Step 4: Simplify right side
    667,456.38x = 347,402,466,802.73
  5. Step 5: Solve for x
    x = 347,402,466,802.73/667,456.38
  6. Step 6: Final answer
    x = 520,487.15

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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.