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Finding the Third Proportional to 172.97 and 189.84

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Solution

The third proportional to 172.97 and 189.84 is: 208.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.97 : 189.84 = 189.84 : x
  2. Step 2: Convert to fraction form
    172.97/189.84 = 189.84/x
  3. Step 3: Cross multiply
    172.97x = 189.84 × 189.84
  4. Step 4: Simplify right side
    172.97x = 36,040.65
  5. Step 5: Solve for x
    x = 36,040.65/172.97
  6. Step 6: Final answer
    x = 208.37

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.