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Finding the Third Proportional to 3,218 and 5,299

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Solution

The third proportional to 3,218 and 5,299 is: 8,725.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218 : 5,299 = 5,299 : x
  2. Step 2: Convert to fraction form
    3,218/5,299 = 5,299/x
  3. Step 3: Cross multiply
    3,218x = 5,299 × 5,299
  4. Step 4: Simplify right side
    3,218x = 28,079,401
  5. Step 5: Solve for x
    x = 28,079,401/3,218
  6. Step 6: Final answer
    x = 8,725.73

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.