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Finding the Fourth Proportional to 2,517.17, 3,775.38 and 668.43

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Solution

The fourth proportional to 2,517.17, 3,775.38 and 668.43 is: 1,002.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,517.17 : 3,775.38 = 668.43 : x
  2. Step 2: Convert to fraction form
    2,517.17/3,775.38 = 668.43/x
  3. Step 3: Cross multiply
    2,517.17x = 3,775.38 × 668.43
  4. Step 4: Simplify right side
    2,517.17x = 2,523,577.25
  5. Step 5: Solve for x
    x = 2,523,577.25/2,517.17
  6. Step 6: Final answer
    x = 1,002.55

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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.