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Finding the Third Proportional to 129.38 and 327.94

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Solution

The third proportional to 129.38 and 327.94 is: 831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.38 : 327.94 = 327.94 : x
  2. Step 2: Convert to fraction form
    129.38/327.94 = 327.94/x
  3. Step 3: Cross multiply
    129.38x = 327.94 × 327.94
  4. Step 4: Simplify right side
    129.38x = 107,543.00
  5. Step 5: Solve for x
    x = 107,543.00/129.38
  6. Step 6: Final answer
    x = 831.25

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Why These Related Problems?

These problems maintain the same ratio (2.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.