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Finding the Third Proportional to 2,986 and 3,943

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Solution

The third proportional to 2,986 and 3,943 is: 5,206.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986 : 3,943 = 3,943 : x
  2. Step 2: Convert to fraction form
    2,986/3,943 = 3,943/x
  3. Step 3: Cross multiply
    2,986x = 3,943 × 3,943
  4. Step 4: Simplify right side
    2,986x = 15,547,249
  5. Step 5: Solve for x
    x = 15,547,249/2,986
  6. Step 6: Final answer
    x = 5,206.71

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.