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Finding the Third Proportional to 161.25 and 254.75

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Solution

The third proportional to 161.25 and 254.75 is: 402.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.25 : 254.75 = 254.75 : x
  2. Step 2: Convert to fraction form
    161.25/254.75 = 254.75/x
  3. Step 3: Cross multiply
    161.25x = 254.75 × 254.75
  4. Step 4: Simplify right side
    161.25x = 64,897.56
  5. Step 5: Solve for x
    x = 64,897.56/161.25
  6. Step 6: Final answer
    x = 402.47

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.