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Finding the Fourth Proportional to 667.43, 1,000.61 and 250.76

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Solution

The fourth proportional to 667.43, 1,000.61 and 250.76 is: 375.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.43 : 1,000.61 = 250.76 : x
  2. Step 2: Convert to fraction form
    667.43/1,000.61 = 250.76/x
  3. Step 3: Cross multiply
    667.43x = 1,000.61 × 250.76
  4. Step 4: Simplify right side
    667.43x = 250,917.44
  5. Step 5: Solve for x
    x = 250,917.44/667.43
  6. Step 6: Final answer
    x = 375.94

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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.