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Finding the Fourth Proportional to 667,066.80, 1,000,600.20 and 400,690.20

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Solution

The fourth proportional to 667,066.80, 1,000,600.20 and 400,690.20 is: 601,035.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,066.80 : 1,000,600.20 = 400,690.20 : x
  2. Step 2: Convert to fraction form
    667,066.80/1,000,600.20 = 400,690.20/x
  3. Step 3: Cross multiply
    667,066.80x = 1,000,600.20 × 400,690.20
  4. Step 4: Simplify right side
    667,066.80x = 400,930,694,258.04
  5. Step 5: Solve for x
    x = 400,930,694,258.04/667,066.80
  6. Step 6: Final answer
    x = 601,035.30

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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.