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Finding the Third Proportional to 931 and 1,993

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Solution

The third proportional to 931 and 1,993 is: 4,266.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    931 : 1,993 = 1,993 : x
  2. Step 2: Convert to fraction form
    931/1,993 = 1,993/x
  3. Step 3: Cross multiply
    931x = 1,993 × 1,993
  4. Step 4: Simplify right side
    931x = 3,972,049
  5. Step 5: Solve for x
    x = 3,972,049/931
  6. Step 6: Final answer
    x = 4,266.43

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.