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Finding the Fourth Proportional to 545,781.80, 818,672.70 and 542,282.60

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Solution

The fourth proportional to 545,781.80, 818,672.70 and 542,282.60 is: 813,423.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,781.80 : 818,672.70 = 542,282.60 : x
  2. Step 2: Convert to fraction form
    545,781.80/818,672.70 = 542,282.60/x
  3. Step 3: Cross multiply
    545,781.80x = 818,672.70 × 542,282.60
  4. Step 4: Simplify right side
    545,781.80x = 443,951,960,305.02
  5. Step 5: Solve for x
    x = 443,951,960,305.02/545,781.80
  6. Step 6: Final answer
    x = 813,423.90

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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.