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Finding the Third Proportional to 108.84 and 169.28

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Solution

The third proportional to 108.84 and 169.28 is: 263.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.84 : 169.28 = 169.28 : x
  2. Step 2: Convert to fraction form
    108.84/169.28 = 169.28/x
  3. Step 3: Cross multiply
    108.84x = 169.28 × 169.28
  4. Step 4: Simplify right side
    108.84x = 28,654.82
  5. Step 5: Solve for x
    x = 28,654.82/108.84
  6. Step 6: Final answer
    x = 263.27

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.