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Finding the Third Proportional to 151.31 and 213.19

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Solution

The third proportional to 151.31 and 213.19 is: 300.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.31 : 213.19 = 213.19 : x
  2. Step 2: Convert to fraction form
    151.31/213.19 = 213.19/x
  3. Step 3: Cross multiply
    151.31x = 213.19 × 213.19
  4. Step 4: Simplify right side
    151.31x = 45,448.91
  5. Step 5: Solve for x
    x = 45,448.91/151.31
  6. Step 6: Final answer
    x = 300.36

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.