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Finding the Fourth Proportional to 3,951.92, 5,919.24 and 2,647.28

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Solution

The fourth proportional to 3,951.92, 5,919.24 and 2,647.28 is: 3,965.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.92 : 5,919.24 = 2,647.28 : x
  2. Step 2: Convert to fraction form
    3,951.92/5,919.24 = 2,647.28/x
  3. Step 3: Cross multiply
    3,951.92x = 5,919.24 × 2,647.28
  4. Step 4: Simplify right side
    3,951.92x = 15,669,885.67
  5. Step 5: Solve for x
    x = 15,669,885.67/3,951.92
  6. Step 6: Final answer
    x = 3,965.13

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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.