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Finding the Third Proportional to 938 and 1,364.38

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Solution

The third proportional to 938 and 1,364.38 is: 1,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    938 : 1,364.38 = 1,364.38 : x
  2. Step 2: Convert to fraction form
    938/1,364.38 = 1,364.38/x
  3. Step 3: Cross multiply
    938x = 1,364.38 × 1,364.38
  4. Step 4: Simplify right side
    938x = 1,861,519.14
  5. Step 5: Solve for x
    x = 1,861,519.14/938
  6. Step 6: Final answer
    x = 1,984.56

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.