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Finding the Fourth Proportional to 681,562.61, 940,593.40 and 391,171.86

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Solution

The fourth proportional to 681,562.61, 940,593.40 and 391,171.86 is: 539,838.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,562.61 : 940,593.40 = 391,171.86 : x
  2. Step 2: Convert to fraction form
    681,562.61/940,593.40 = 391,171.86/x
  3. Step 3: Cross multiply
    681,562.61x = 940,593.40 × 391,171.86
  4. Step 4: Simplify right side
    681,562.61x = 367,933,665,474.38
  5. Step 5: Solve for x
    x = 367,933,665,474.38/681,562.61
  6. Step 6: Final answer
    x = 539,838.39

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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.