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Finding the Fourth Proportional to 667,489.80, 1,001,343.90 and 218,080.20

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Solution

The fourth proportional to 667,489.80, 1,001,343.90 and 218,080.20 is: 327,155.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,489.80 : 1,001,343.90 = 218,080.20 : x
  2. Step 2: Convert to fraction form
    667,489.80/1,001,343.90 = 218,080.20/x
  3. Step 3: Cross multiply
    667,489.80x = 1,001,343.90 × 218,080.20
  4. Step 4: Simplify right side
    667,489.80x = 218,373,277,980.78
  5. Step 5: Solve for x
    x = 218,373,277,980.78/667,489.80
  6. Step 6: Final answer
    x = 327,155.98

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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.