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Finding the Third Proportional to 721.50 and 1,161.94

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Solution

The third proportional to 721.50 and 1,161.94 is: 1,871.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.50 : 1,161.94 = 1,161.94 : x
  2. Step 2: Convert to fraction form
    721.50/1,161.94 = 1,161.94/x
  3. Step 3: Cross multiply
    721.50x = 1,161.94 × 1,161.94
  4. Step 4: Simplify right side
    721.50x = 1,350,098.75
  5. Step 5: Solve for x
    x = 1,350,098.75/721.50
  6. Step 6: Final answer
    x = 1,871.24

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.