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Finding the Third Proportional to 1,138.13 and 2,500.31

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Solution

The third proportional to 1,138.13 and 2,500.31 is: 5,492.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.13 : 2,500.31 = 2,500.31 : x
  2. Step 2: Convert to fraction form
    1,138.13/2,500.31 = 2,500.31/x
  3. Step 3: Cross multiply
    1,138.13x = 2,500.31 × 2,500.31
  4. Step 4: Simplify right side
    1,138.13x = 6,251,562.60
  5. Step 5: Solve for x
    x = 6,251,562.60/1,138.13
  6. Step 6: Final answer
    x = 5,492.86

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.