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Finding the Fourth Proportional to 445,964.10, 667,002.15 and 398,919.30

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Solution

The fourth proportional to 445,964.10, 667,002.15 and 398,919.30 is: 596,640.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,964.10 : 667,002.15 = 398,919.30 : x
  2. Step 2: Convert to fraction form
    445,964.10/667,002.15 = 398,919.30/x
  3. Step 3: Cross multiply
    445,964.10x = 667,002.15 × 398,919.30
  4. Step 4: Simplify right side
    445,964.10x = 266,080,030,776.50
  5. Step 5: Solve for x
    x = 266,080,030,776.50/445,964.10
  6. Step 6: Final answer
    x = 596,640.02

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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.