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Finding the Fourth Proportional to 521,388.86, 781,797.55 and 161,459.79

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Solution

The fourth proportional to 521,388.86, 781,797.55 and 161,459.79 is: 242,101.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,388.86 : 781,797.55 = 161,459.79 : x
  2. Step 2: Convert to fraction form
    521,388.86/781,797.55 = 161,459.79/x
  3. Step 3: Cross multiply
    521,388.86x = 781,797.55 × 161,459.79
  4. Step 4: Simplify right side
    521,388.86x = 126,228,867,841.87
  5. Step 5: Solve for x
    x = 126,228,867,841.87/521,388.86
  6. Step 6: Final answer
    x = 242,101.20

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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.