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Finding the Third Proportional to 6,778 and 7,418

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Solution

The third proportional to 6,778 and 7,418 is: 8,118.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,778 : 7,418 = 7,418 : x
  2. Step 2: Convert to fraction form
    6,778/7,418 = 7,418/x
  3. Step 3: Cross multiply
    6,778x = 7,418 × 7,418
  4. Step 4: Simplify right side
    6,778x = 55,026,724
  5. Step 5: Solve for x
    x = 55,026,724/6,778
  6. Step 6: Final answer
    x = 8,118.43

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.