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Finding the Third Proportional to 91.13 and 199.97

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Solution

The third proportional to 91.13 and 199.97 is: 438.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.13 : 199.97 = 199.97 : x
  2. Step 2: Convert to fraction form
    91.13/199.97 = 199.97/x
  3. Step 3: Cross multiply
    91.13x = 199.97 × 199.97
  4. Step 4: Simplify right side
    91.13x = 39,987.50
  5. Step 5: Solve for x
    x = 39,987.50/91.13
  6. Step 6: Final answer
    x = 438.82

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.