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Finding the Fourth Proportional to 363,781.80, 545,672.70 and 287,674.20

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Solution

The fourth proportional to 363,781.80, 545,672.70 and 287,674.20 is: 431,511.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,781.80 : 545,672.70 = 287,674.20 : x
  2. Step 2: Convert to fraction form
    363,781.80/545,672.70 = 287,674.20/x
  3. Step 3: Cross multiply
    363,781.80x = 545,672.70 × 287,674.20
  4. Step 4: Simplify right side
    363,781.80x = 156,975,957,434.34
  5. Step 5: Solve for x
    x = 156,975,957,434.34/363,781.80
  6. Step 6: Final answer
    x = 431,511.30

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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.