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Finding the Third Proportional to 8,605 and 9,415

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Solution

The third proportional to 8,605 and 9,415 is: 10,301.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605 : 9,415 = 9,415 : x
  2. Step 2: Convert to fraction form
    8,605/9,415 = 9,415/x
  3. Step 3: Cross multiply
    8,605x = 9,415 × 9,415
  4. Step 4: Simplify right side
    8,605x = 88,642,225
  5. Step 5: Solve for x
    x = 88,642,225/8,605
  6. Step 6: Final answer
    x = 10,301.25

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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.