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Finding the Third Proportional to 172.25 and 352.38

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Solution

The third proportional to 172.25 and 352.38 is: 720.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.25 : 352.38 = 352.38 : x
  2. Step 2: Convert to fraction form
    172.25/352.38 = 352.38/x
  3. Step 3: Cross multiply
    172.25x = 352.38 × 352.38
  4. Step 4: Simplify right side
    172.25x = 124,168.14
  5. Step 5: Solve for x
    x = 124,168.14/172.25
  6. Step 6: Final answer
    x = 720.86

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.