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Finding the Third Proportional to 721.41 and 1,161.84

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Solution

The third proportional to 721.41 and 1,161.84 is: 1,871.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.41 : 1,161.84 = 1,161.84 : x
  2. Step 2: Convert to fraction form
    721.41/1,161.84 = 1,161.84/x
  3. Step 3: Cross multiply
    721.41x = 1,161.84 × 1,161.84
  4. Step 4: Simplify right side
    721.41x = 1,349,880.90
  5. Step 5: Solve for x
    x = 1,349,880.90/721.41
  6. Step 6: Final answer
    x = 1,871.18

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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.