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Finding the Fourth Proportional to 439,794.60, 659,691.90 and 287,579.40

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Solution

The fourth proportional to 439,794.60, 659,691.90 and 287,579.40 is: 431,369.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,794.60 : 659,691.90 = 287,579.40 : x
  2. Step 2: Convert to fraction form
    439,794.60/659,691.90 = 287,579.40/x
  3. Step 3: Cross multiply
    439,794.60x = 659,691.90 × 287,579.40
  4. Step 4: Simplify right side
    439,794.60x = 189,713,800,786.86
  5. Step 5: Solve for x
    x = 189,713,800,786.86/439,794.60
  6. Step 6: Final answer
    x = 431,369.10

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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.