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Finding the Third Proportional to 982.50 and 1,989.75

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Solution

The third proportional to 982.50 and 1,989.75 is: 4,029.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.50 : 1,989.75 = 1,989.75 : x
  2. Step 2: Convert to fraction form
    982.50/1,989.75 = 1,989.75/x
  3. Step 3: Cross multiply
    982.50x = 1,989.75 × 1,989.75
  4. Step 4: Simplify right side
    982.50x = 3,959,105.06
  5. Step 5: Solve for x
    x = 3,959,105.06/982.50
  6. Step 6: Final answer
    x = 4,029.62

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.