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Finding the Third Proportional to 613.13 and 721.13

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Solution

The third proportional to 613.13 and 721.13 is: 848.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.13 : 721.13 = 721.13 : x
  2. Step 2: Convert to fraction form
    613.13/721.13 = 721.13/x
  3. Step 3: Cross multiply
    613.13x = 721.13 × 721.13
  4. Step 4: Simplify right side
    613.13x = 520,021.27
  5. Step 5: Solve for x
    x = 520,021.27/613.13
  6. Step 6: Final answer
    x = 848.15

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.