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Finding the Fourth Proportional to 3,986.88, 5,976.12 and 2,750.28

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Solution

The fourth proportional to 3,986.88, 5,976.12 and 2,750.28 is: 4,122.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.88 : 5,976.12 = 2,750.28 : x
  2. Step 2: Convert to fraction form
    3,986.88/5,976.12 = 2,750.28/x
  3. Step 3: Cross multiply
    3,986.88x = 5,976.12 × 2,750.28
  4. Step 4: Simplify right side
    3,986.88x = 16,436,003.31
  5. Step 5: Solve for x
    x = 16,436,003.31/3,986.88
  6. Step 6: Final answer
    x = 4,122.52

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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.