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Finding the Third Proportional to 151.13 and 321.94

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Solution

The third proportional to 151.13 and 321.94 is: 685.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.13 : 321.94 = 321.94 : x
  2. Step 2: Convert to fraction form
    151.13/321.94 = 321.94/x
  3. Step 3: Cross multiply
    151.13x = 321.94 × 321.94
  4. Step 4: Simplify right side
    151.13x = 103,643.75
  5. Step 5: Solve for x
    x = 103,643.75/151.13
  6. Step 6: Final answer
    x = 685.81

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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.