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Finding the Third Proportional to 1,986.13 and 3,922.38

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Solution

The third proportional to 1,986.13 and 3,922.38 is: 7,746.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.13 : 3,922.38 = 3,922.38 : x
  2. Step 2: Convert to fraction form
    1,986.13/3,922.38 = 3,922.38/x
  3. Step 3: Cross multiply
    1,986.13x = 3,922.38 × 3,922.38
  4. Step 4: Simplify right side
    1,986.13x = 15,385,025.64
  5. Step 5: Solve for x
    x = 15,385,025.64/1,986.13
  6. Step 6: Final answer
    x = 7,746.25

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.