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Finding the Third Proportional to 66.88 and 163.94

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Solution

The third proportional to 66.88 and 163.94 is: 401.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.88 : 163.94 = 163.94 : x
  2. Step 2: Convert to fraction form
    66.88/163.94 = 163.94/x
  3. Step 3: Cross multiply
    66.88x = 163.94 × 163.94
  4. Step 4: Simplify right side
    66.88x = 26,875.50
  5. Step 5: Solve for x
    x = 26,875.50/66.88
  6. Step 6: Final answer
    x = 401.88

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Why These Related Problems?

These problems maintain the same ratio (2.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.