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Finding the Third Proportional to 151.25 and 322.75

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Solution

The third proportional to 151.25 and 322.75 is: 688.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.25 : 322.75 = 322.75 : x
  2. Step 2: Convert to fraction form
    151.25/322.75 = 322.75/x
  3. Step 3: Cross multiply
    151.25x = 322.75 × 322.75
  4. Step 4: Simplify right side
    151.25x = 104,167.56
  5. Step 5: Solve for x
    x = 104,167.56/151.25
  6. Step 6: Final answer
    x = 688.71

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.