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Finding the Fourth Proportional to 391,917.10, 587,000.85 and 302,468.80

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Solution

The fourth proportional to 391,917.10, 587,000.85 and 302,468.80 is: 453,028.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,917.10 : 587,000.85 = 302,468.80 : x
  2. Step 2: Convert to fraction form
    391,917.10/587,000.85 = 302,468.80/x
  3. Step 3: Cross multiply
    391,917.10x = 587,000.85 × 302,468.80
  4. Step 4: Simplify right side
    391,917.10x = 177,549,442,698.48
  5. Step 5: Solve for x
    x = 177,549,442,698.48/391,917.10
  6. Step 6: Final answer
    x = 453,028.06

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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.