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Finding the Third Proportional to 91.50 and 163.25

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Solution

The third proportional to 91.50 and 163.25 is: 291.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.50 : 163.25 = 163.25 : x
  2. Step 2: Convert to fraction form
    91.50/163.25 = 163.25/x
  3. Step 3: Cross multiply
    91.50x = 163.25 × 163.25
  4. Step 4: Simplify right side
    91.50x = 26,650.56
  5. Step 5: Solve for x
    x = 26,650.56/91.50
  6. Step 6: Final answer
    x = 291.26

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.