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Finding the Third Proportional to 1,996.50 and 4,090

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Solution

The third proportional to 1,996.50 and 4,090 is: 8,378.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,996.50 : 4,090 = 4,090 : x
  2. Step 2: Convert to fraction form
    1,996.50/4,090 = 4,090/x
  3. Step 3: Cross multiply
    1,996.50x = 4,090 × 4,090
  4. Step 4: Simplify right side
    1,996.50x = 16,728,100
  5. Step 5: Solve for x
    x = 16,728,100/1,996.50
  6. Step 6: Final answer
    x = 8,378.71

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.