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Finding the Fourth Proportional to 445,286.16, 667,864.44 and 129,658.32

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Solution

The fourth proportional to 445,286.16, 667,864.44 and 129,658.32 is: 194,468.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,286.16 : 667,864.44 = 129,658.32 : x
  2. Step 2: Convert to fraction form
    445,286.16/667,864.44 = 129,658.32/x
  3. Step 3: Cross multiply
    445,286.16x = 667,864.44 × 129,658.32
  4. Step 4: Simplify right side
    445,286.16x = 86,594,181,278.14
  5. Step 5: Solve for x
    x = 86,594,181,278.14/445,286.16
  6. Step 6: Final answer
    x = 194,468.61

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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.