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Finding the Third Proportional to 938 and 1,411

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Solution

The third proportional to 938 and 1,411 is: 2,122.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    938 : 1,411 = 1,411 : x
  2. Step 2: Convert to fraction form
    938/1,411 = 1,411/x
  3. Step 3: Cross multiply
    938x = 1,411 × 1,411
  4. Step 4: Simplify right side
    938x = 1,990,921
  5. Step 5: Solve for x
    x = 1,990,921/938
  6. Step 6: Final answer
    x = 2,122.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.