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Finding the Third Proportional to 721.13 and 1,150.31

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Solution

The third proportional to 721.13 and 1,150.31 is: 1,834.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.13 : 1,150.31 = 1,150.31 : x
  2. Step 2: Convert to fraction form
    721.13/1,150.31 = 1,150.31/x
  3. Step 3: Cross multiply
    721.13x = 1,150.31 × 1,150.31
  4. Step 4: Simplify right side
    721.13x = 1,323,218.85
  5. Step 5: Solve for x
    x = 1,323,218.85/721.13
  6. Step 6: Final answer
    x = 1,834.94

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.