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Finding the Third Proportional to 133.22 and 208.69

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Solution

The third proportional to 133.22 and 208.69 is: 326.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.22 : 208.69 = 208.69 : x
  2. Step 2: Convert to fraction form
    133.22/208.69 = 208.69/x
  3. Step 3: Cross multiply
    133.22x = 208.69 × 208.69
  4. Step 4: Simplify right side
    133.22x = 43,550.47
  5. Step 5: Solve for x
    x = 43,550.47/133.22
  6. Step 6: Final answer
    x = 326.91

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.