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Finding the Third Proportional to 7,985 and 8,705

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Solution

The third proportional to 7,985 and 8,705 is: 9,489.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985 : 8,705 = 8,705 : x
  2. Step 2: Convert to fraction form
    7,985/8,705 = 8,705/x
  3. Step 3: Cross multiply
    7,985x = 8,705 × 8,705
  4. Step 4: Simplify right side
    7,985x = 75,777,025
  5. Step 5: Solve for x
    x = 75,777,025/7,985
  6. Step 6: Final answer
    x = 9,489.92

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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.