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Finding the Third Proportional to 938 and 1,369

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Solution

The third proportional to 938 and 1,369 is: 1,998.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    938 : 1,369 = 1,369 : x
  2. Step 2: Convert to fraction form
    938/1,369 = 1,369/x
  3. Step 3: Cross multiply
    938x = 1,369 × 1,369
  4. Step 4: Simplify right side
    938x = 1,874,161
  5. Step 5: Solve for x
    x = 1,874,161/938
  6. Step 6: Final answer
    x = 1,998.04

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.