Home / 521,146.20-781,719.30-492,115.80

Finding the Fourth Proportional to 521,146.20, 781,719.30 and 492,115.80

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Solution

The fourth proportional to 521,146.20, 781,719.30 and 492,115.80 is: 738,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,146.20 : 781,719.30 = 492,115.80 : x
  2. Step 2: Convert to fraction form
    521,146.20/781,719.30 = 492,115.80/x
  3. Step 3: Cross multiply
    521,146.20x = 781,719.30 × 492,115.80
  4. Step 4: Simplify right side
    521,146.20x = 384,696,418,694.94
  5. Step 5: Solve for x
    x = 384,696,418,694.94/521,146.20
  6. Step 6: Final answer
    x = 738,173.70

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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.