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Finding the Third Proportional to 129.09 and 273.09

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Solution

The third proportional to 129.09 and 273.09 is: 577.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.09 : 273.09 = 273.09 : x
  2. Step 2: Convert to fraction form
    129.09/273.09 = 273.09/x
  3. Step 3: Cross multiply
    129.09x = 273.09 × 273.09
  4. Step 4: Simplify right side
    129.09x = 74,580.20
  5. Step 5: Solve for x
    x = 74,580.20/129.09
  6. Step 6: Final answer
    x = 577.72

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.