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Finding the Third Proportional to 986 and 2,166.50

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Solution

The third proportional to 986 and 2,166.50 is: 4,760.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    986 : 2,166.50 = 2,166.50 : x
  2. Step 2: Convert to fraction form
    986/2,166.50 = 2,166.50/x
  3. Step 3: Cross multiply
    986x = 2,166.50 × 2,166.50
  4. Step 4: Simplify right side
    986x = 4,693,722.25
  5. Step 5: Solve for x
    x = 4,693,722.25/986
  6. Step 6: Final answer
    x = 4,760.37

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.