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Finding the Third Proportional to 3,015 and 3,285

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Solution

The third proportional to 3,015 and 3,285 is: 3,579.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015 : 3,285 = 3,285 : x
  2. Step 2: Convert to fraction form
    3,015/3,285 = 3,285/x
  3. Step 3: Cross multiply
    3,015x = 3,285 × 3,285
  4. Step 4: Simplify right side
    3,015x = 10,791,225
  5. Step 5: Solve for x
    x = 10,791,225/3,015
  6. Step 6: Final answer
    x = 3,579.18

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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.