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Finding the Third Proportional to 1,216.75 and 2,979.25

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Solution

The third proportional to 1,216.75 and 2,979.25 is: 7,294.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.75 : 2,979.25 = 2,979.25 : x
  2. Step 2: Convert to fraction form
    1,216.75/2,979.25 = 2,979.25/x
  3. Step 3: Cross multiply
    1,216.75x = 2,979.25 × 2,979.25
  4. Step 4: Simplify right side
    1,216.75x = 8,875,930.56
  5. Step 5: Solve for x
    x = 8,875,930.56/1,216.75
  6. Step 6: Final answer
    x = 7,294.79

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Why These Related Problems?

These problems maintain the same ratio (2.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.