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Finding the Fourth Proportional to 3,991.68, 5,508 and 2,223.12

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Solution

The fourth proportional to 3,991.68, 5,508 and 2,223.12 is: 3,067.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.68 : 5,508 = 2,223.12 : x
  2. Step 2: Convert to fraction form
    3,991.68/5,508 = 2,223.12/x
  3. Step 3: Cross multiply
    3,991.68x = 5,508 × 2,223.12
  4. Step 4: Simplify right side
    3,991.68x = 12,244,944.96
  5. Step 5: Solve for x
    x = 12,244,944.96/3,991.68
  6. Step 6: Final answer
    x = 3,067.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.