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Finding the Third Proportional to 6,378 and 7,685

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Solution

The third proportional to 6,378 and 7,685 is: 9,259.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,378 : 7,685 = 7,685 : x
  2. Step 2: Convert to fraction form
    6,378/7,685 = 7,685/x
  3. Step 3: Cross multiply
    6,378x = 7,685 × 7,685
  4. Step 4: Simplify right side
    6,378x = 59,059,225
  5. Step 5: Solve for x
    x = 59,059,225/6,378
  6. Step 6: Final answer
    x = 9,259.83

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.