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Finding the Fourth Proportional to 542,372.40, 813,688.20 and 261,658.80

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Solution

The fourth proportional to 542,372.40, 813,688.20 and 261,658.80 is: 392,550.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,372.40 : 813,688.20 = 261,658.80 : x
  2. Step 2: Convert to fraction form
    542,372.40/813,688.20 = 261,658.80/x
  3. Step 3: Cross multiply
    542,372.40x = 813,688.20 × 261,658.80
  4. Step 4: Simplify right side
    542,372.40x = 212,908,677,986.16
  5. Step 5: Solve for x
    x = 212,908,677,986.16/542,372.40
  6. Step 6: Final answer
    x = 392,550.72

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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.