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Finding the Third Proportional to 983.50 and 2,120.75

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Solution

The third proportional to 983.50 and 2,120.75 is: 4,573.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.50 : 2,120.75 = 2,120.75 : x
  2. Step 2: Convert to fraction form
    983.50/2,120.75 = 2,120.75/x
  3. Step 3: Cross multiply
    983.50x = 2,120.75 × 2,120.75
  4. Step 4: Simplify right side
    983.50x = 4,497,580.56
  5. Step 5: Solve for x
    x = 4,497,580.56/983.50
  6. Step 6: Final answer
    x = 4,573.04

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.