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Finding the Third Proportional to 1,247 and 2,529

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Solution

The third proportional to 1,247 and 2,529 is: 5,128.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247 : 2,529 = 2,529 : x
  2. Step 2: Convert to fraction form
    1,247/2,529 = 2,529/x
  3. Step 3: Cross multiply
    1,247x = 2,529 × 2,529
  4. Step 4: Simplify right side
    1,247x = 6,395,841
  5. Step 5: Solve for x
    x = 6,395,841/1,247
  6. Step 6: Final answer
    x = 5,128.98

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.