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Finding the Fourth Proportional to 439,575.45, 658,878.78 and 287,589.87

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Solution

The fourth proportional to 439,575.45, 658,878.78 and 287,589.87 is: 431,067.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,575.45 : 658,878.78 = 287,589.87 : x
  2. Step 2: Convert to fraction form
    439,575.45/658,878.78 = 287,589.87/x
  3. Step 3: Cross multiply
    439,575.45x = 658,878.78 × 287,589.87
  4. Step 4: Simplify right side
    439,575.45x = 189,486,862,685.96
  5. Step 5: Solve for x
    x = 189,486,862,685.96/439,575.45
  6. Step 6: Final answer
    x = 431,067.89

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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.