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Finding the Fourth Proportional to 439,793.10, 659,689.65 and 287,577.90

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Solution

The fourth proportional to 439,793.10, 659,689.65 and 287,577.90 is: 431,366.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,793.10 : 659,689.65 = 287,577.90 : x
  2. Step 2: Convert to fraction form
    439,793.10/659,689.65 = 287,577.90/x
  3. Step 3: Cross multiply
    439,793.10x = 659,689.65 × 287,577.90
  4. Step 4: Simplify right side
    439,793.10x = 189,712,164,198.74
  5. Step 5: Solve for x
    x = 189,712,164,198.74/439,793.10
  6. Step 6: Final answer
    x = 431,366.85

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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.