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Finding the Fourth Proportional to 391,375.44, 586,909.98 and 138,558.24

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Solution

The fourth proportional to 391,375.44, 586,909.98 and 138,558.24 is: 207,783.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,375.44 : 586,909.98 = 138,558.24 : x
  2. Step 2: Convert to fraction form
    391,375.44/586,909.98 = 138,558.24/x
  3. Step 3: Cross multiply
    391,375.44x = 586,909.98 × 138,558.24
  4. Step 4: Simplify right side
    391,375.44x = 81,321,213,867.24
  5. Step 5: Solve for x
    x = 81,321,213,867.24/391,375.44
  6. Step 6: Final answer
    x = 207,783.13

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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.