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Finding the Fourth Proportional to 542,442.30, 813,663.45 and 261,987.90

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Solution

The fourth proportional to 542,442.30, 813,663.45 and 261,987.90 is: 392,981.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,442.30 : 813,663.45 = 261,987.90 : x
  2. Step 2: Convert to fraction form
    542,442.30/813,663.45 = 261,987.90/x
  3. Step 3: Cross multiply
    542,442.30x = 813,663.45 × 261,987.90
  4. Step 4: Simplify right side
    542,442.30x = 213,169,978,572.26
  5. Step 5: Solve for x
    x = 213,169,978,572.26/542,442.30
  6. Step 6: Final answer
    x = 392,981.85

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Similar ratio
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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.