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Finding the Third Proportional to 986.91 and 2,149.03

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Solution

The third proportional to 986.91 and 2,149.03 is: 4,679.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.91 : 2,149.03 = 2,149.03 : x
  2. Step 2: Convert to fraction form
    986.91/2,149.03 = 2,149.03/x
  3. Step 3: Cross multiply
    986.91x = 2,149.03 × 2,149.03
  4. Step 4: Simplify right side
    986.91x = 4,618,335.31
  5. Step 5: Solve for x
    x = 4,618,335.31/986.91
  6. Step 6: Final answer
    x = 4,679.61

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.