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Finding the Fourth Proportional to 442,909.10, 664,363.65 and 431,245.10

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Solution

The fourth proportional to 442,909.10, 664,363.65 and 431,245.10 is: 646,867.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,909.10 : 664,363.65 = 431,245.10 : x
  2. Step 2: Convert to fraction form
    442,909.10/664,363.65 = 431,245.10/x
  3. Step 3: Cross multiply
    442,909.10x = 664,363.65 × 431,245.10
  4. Step 4: Simplify right side
    442,909.10x = 286,503,568,680.62
  5. Step 5: Solve for x
    x = 286,503,568,680.62/442,909.10
  6. Step 6: Final answer
    x = 646,867.65

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Similar ratio
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1.5x scale

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.