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Finding the Third Proportional to 272.39 and 587.21

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Solution

The third proportional to 272.39 and 587.21 is: 1,265.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.39 : 587.21 = 587.21 : x
  2. Step 2: Convert to fraction form
    272.39/587.21 = 587.21/x
  3. Step 3: Cross multiply
    272.39x = 587.21 × 587.21
  4. Step 4: Simplify right side
    272.39x = 344,821.27
  5. Step 5: Solve for x
    x = 344,821.27/272.39
  6. Step 6: Final answer
    x = 1,265.91

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.