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Finding the Fourth Proportional to 542,749.40, 813,978.30 and 187,872.20

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Solution

The fourth proportional to 542,749.40, 813,978.30 and 187,872.20 is: 281,757.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,749.40 : 813,978.30 = 187,872.20 : x
  2. Step 2: Convert to fraction form
    542,749.40/813,978.30 = 187,872.20/x
  3. Step 3: Cross multiply
    542,749.40x = 813,978.30 × 187,872.20
  4. Step 4: Simplify right side
    542,749.40x = 152,923,893,973.26
  5. Step 5: Solve for x
    x = 152,923,893,973.26/542,749.40
  6. Step 6: Final answer
    x = 281,757.83

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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.