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Finding the Third Proportional to 163.88 and 207.69

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Solution

The third proportional to 163.88 and 207.69 is: 263.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.88 : 207.69 = 207.69 : x
  2. Step 2: Convert to fraction form
    163.88/207.69 = 207.69/x
  3. Step 3: Cross multiply
    163.88x = 207.69 × 207.69
  4. Step 4: Simplify right side
    163.88x = 43,134.10
  5. Step 5: Solve for x
    x = 43,134.10/163.88
  6. Step 6: Final answer
    x = 263.21

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.