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Finding the Fourth Proportional to 2,874, 4,311.88 and 1,997.40

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Solution

The fourth proportional to 2,874, 4,311.88 and 1,997.40 is: 2,996.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,874 : 4,311.88 = 1,997.40 : x
  2. Step 2: Convert to fraction form
    2,874/4,311.88 = 1,997.40/x
  3. Step 3: Cross multiply
    2,874x = 4,311.88 × 1,997.40
  4. Step 4: Simplify right side
    2,874x = 8,612,549.11
  5. Step 5: Solve for x
    x = 8,612,549.11/2,874
  6. Step 6: Final answer
    x = 2,996.71

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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.