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Finding the Third Proportional to 261 and 547.31

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Solution

The third proportional to 261 and 547.31 is: 1,147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261 : 547.31 = 547.31 : x
  2. Step 2: Convert to fraction form
    261/547.31 = 547.31/x
  3. Step 3: Cross multiply
    261x = 547.31 × 547.31
  4. Step 4: Simplify right side
    261x = 299,550.97
  5. Step 5: Solve for x
    x = 299,550.97/261
  6. Step 6: Final answer
    x = 1,147.70

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.