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Finding the Third Proportional to 981.38 and 2,147.25

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Solution

The third proportional to 981.38 and 2,147.25 is: 4,698.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.38 : 2,147.25 = 2,147.25 : x
  2. Step 2: Convert to fraction form
    981.38/2,147.25 = 2,147.25/x
  3. Step 3: Cross multiply
    981.38x = 2,147.25 × 2,147.25
  4. Step 4: Simplify right side
    981.38x = 4,610,682.56
  5. Step 5: Solve for x
    x = 4,610,682.56/981.38
  6. Step 6: Final answer
    x = 4,698.19

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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.