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Finding the Third Proportional to 1,518.75 and 3,318.68

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Solution

The third proportional to 1,518.75 and 3,318.68 is: 7,251.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.75 : 3,318.68 = 3,318.68 : x
  2. Step 2: Convert to fraction form
    1,518.75/3,318.68 = 3,318.68/x
  3. Step 3: Cross multiply
    1,518.75x = 3,318.68 × 3,318.68
  4. Step 4: Simplify right side
    1,518.75x = 11,013,634.87
  5. Step 5: Solve for x
    x = 11,013,634.87/1,518.75
  6. Step 6: Final answer
    x = 7,251.78

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.