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Finding the Third Proportional to 567 and 1,311

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Solution

The third proportional to 567 and 1,311 is: 3,031.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    567 : 1,311 = 1,311 : x
  2. Step 2: Convert to fraction form
    567/1,311 = 1,311/x
  3. Step 3: Cross multiply
    567x = 1,311 × 1,311
  4. Step 4: Simplify right side
    567x = 1,718,721
  5. Step 5: Solve for x
    x = 1,718,721/567
  6. Step 6: Final answer
    x = 3,031.25

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.