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Finding the Fourth Proportional to 521,387.93, 781,796.16 and 161,458.86

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Solution

The fourth proportional to 521,387.93, 781,796.16 and 161,458.86 is: 242,099.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,387.93 : 781,796.16 = 161,458.86 : x
  2. Step 2: Convert to fraction form
    521,387.93/781,796.16 = 161,458.86/x
  3. Step 3: Cross multiply
    521,387.93x = 781,796.16 × 161,458.86
  4. Step 4: Simplify right side
    521,387.93x = 126,227,916,745.98
  5. Step 5: Solve for x
    x = 126,227,916,745.98/521,387.93
  6. Step 6: Final answer
    x = 242,099.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.