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Finding the Fourth Proportional to 3,984.38, 5,978.28 and 2,134.97

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Solution

The fourth proportional to 3,984.38, 5,978.28 and 2,134.97 is: 3,203.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984.38 : 5,978.28 = 2,134.97 : x
  2. Step 2: Convert to fraction form
    3,984.38/5,978.28 = 2,134.97/x
  3. Step 3: Cross multiply
    3,984.38x = 5,978.28 × 2,134.97
  4. Step 4: Simplify right side
    3,984.38x = 12,763,418.56
  5. Step 5: Solve for x
    x = 12,763,418.56/3,984.38
  6. Step 6: Final answer
    x = 3,203.37

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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.