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Finding the Fourth Proportional to 3,789.72, 5,228.10 and 2,217.15

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Solution

The fourth proportional to 3,789.72, 5,228.10 and 2,217.15 is: 3,058.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,789.72 : 5,228.10 = 2,217.15 : x
  2. Step 2: Convert to fraction form
    3,789.72/5,228.10 = 2,217.15/x
  3. Step 3: Cross multiply
    3,789.72x = 5,228.10 × 2,217.15
  4. Step 4: Simplify right side
    3,789.72x = 11,591,481.92
  5. Step 5: Solve for x
    x = 11,591,481.92/3,789.72
  6. Step 6: Final answer
    x = 3,058.66

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