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Finding the Fourth Proportional to 445,279.68, 667,932.48 and 129,729.60

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Solution

The fourth proportional to 445,279.68, 667,932.48 and 129,729.60 is: 194,598.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,279.68 : 667,932.48 = 129,729.60 : x
  2. Step 2: Convert to fraction form
    445,279.68/667,932.48 = 129,729.60/x
  3. Step 3: Cross multiply
    445,279.68x = 667,932.48 × 129,729.60
  4. Step 4: Simplify right side
    445,279.68x = 86,650,613,457.41
  5. Step 5: Solve for x
    x = 86,650,613,457.41/445,279.68
  6. Step 6: Final answer
    x = 194,598.18

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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.