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Finding the Third Proportional to 3,220 and 3,508

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Solution

The third proportional to 3,220 and 3,508 is: 3,821.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220 : 3,508 = 3,508 : x
  2. Step 2: Convert to fraction form
    3,220/3,508 = 3,508/x
  3. Step 3: Cross multiply
    3,220x = 3,508 × 3,508
  4. Step 4: Simplify right side
    3,220x = 12,306,064
  5. Step 5: Solve for x
    x = 12,306,064/3,220
  6. Step 6: Final answer
    x = 3,821.76

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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.