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Finding the Third Proportional to 7,478 and 8,288

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Solution

The third proportional to 7,478 and 8,288 is: 9,185.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478 : 8,288 = 8,288 : x
  2. Step 2: Convert to fraction form
    7,478/8,288 = 8,288/x
  3. Step 3: Cross multiply
    7,478x = 8,288 × 8,288
  4. Step 4: Simplify right side
    7,478x = 68,690,944
  5. Step 5: Solve for x
    x = 68,690,944/7,478
  6. Step 6: Final answer
    x = 9,185.74

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.