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Finding the Fourth Proportional to 445,964.60, 667,002.90 and 398,919.80

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Solution

The fourth proportional to 445,964.60, 667,002.90 and 398,919.80 is: 596,640.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,964.60 : 667,002.90 = 398,919.80 : x
  2. Step 2: Convert to fraction form
    445,964.60/667,002.90 = 398,919.80/x
  3. Step 3: Cross multiply
    445,964.60x = 667,002.90 × 398,919.80
  4. Step 4: Simplify right side
    445,964.60x = 266,080,663,467.42
  5. Step 5: Solve for x
    x = 266,080,663,467.42/445,964.60
  6. Step 6: Final answer
    x = 596,640.77

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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.