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Finding the Fourth Proportional to 667.49, 1,001.44 and 343.09

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Solution

The fourth proportional to 667.49, 1,001.44 and 343.09 is: 514.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.49 : 1,001.44 = 343.09 : x
  2. Step 2: Convert to fraction form
    667.49/1,001.44 = 343.09/x
  3. Step 3: Cross multiply
    667.49x = 1,001.44 × 343.09
  4. Step 4: Simplify right side
    667.49x = 343,584.05
  5. Step 5: Solve for x
    x = 343,584.05/667.49
  6. Step 6: Final answer
    x = 514.74

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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.