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Finding the Third Proportional to 938 and 1,269

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Solution

The third proportional to 938 and 1,269 is: 1,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    938 : 1,269 = 1,269 : x
  2. Step 2: Convert to fraction form
    938/1,269 = 1,269/x
  3. Step 3: Cross multiply
    938x = 1,269 × 1,269
  4. Step 4: Simplify right side
    938x = 1,610,361
  5. Step 5: Solve for x
    x = 1,610,361/938
  6. Step 6: Final answer
    x = 1,716.80

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.