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Finding the Third Proportional to 6,978 and 8,202

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Solution

The third proportional to 6,978 and 8,202 is: 9,640.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978 : 8,202 = 8,202 : x
  2. Step 2: Convert to fraction form
    6,978/8,202 = 8,202/x
  3. Step 3: Cross multiply
    6,978x = 8,202 × 8,202
  4. Step 4: Simplify right side
    6,978x = 67,272,804
  5. Step 5: Solve for x
    x = 67,272,804/6,978
  6. Step 6: Final answer
    x = 9,640.70

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.