Home / 521,110.20-781,314.90-205,404.60

Finding the Fourth Proportional to 521,110.20, 781,314.90 and 205,404.60

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Solution

The fourth proportional to 521,110.20, 781,314.90 and 205,404.60 is: 307,968.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,110.20 : 781,314.90 = 205,404.60 : x
  2. Step 2: Convert to fraction form
    521,110.20/781,314.90 = 205,404.60/x
  3. Step 3: Cross multiply
    521,110.20x = 781,314.90 × 205,404.60
  4. Step 4: Simplify right side
    521,110.20x = 160,485,674,508.54
  5. Step 5: Solve for x
    x = 160,485,674,508.54/521,110.20
  6. Step 6: Final answer
    x = 307,968.78

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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.