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Finding the Third Proportional to 984.38 and 2,120.63

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Solution

The third proportional to 984.38 and 2,120.63 is: 4,568.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.38 : 2,120.63 = 2,120.63 : x
  2. Step 2: Convert to fraction form
    984.38/2,120.63 = 2,120.63/x
  3. Step 3: Cross multiply
    984.38x = 2,120.63 × 2,120.63
  4. Step 4: Simplify right side
    984.38x = 4,497,050.39
  5. Step 5: Solve for x
    x = 4,497,050.39/984.38
  6. Step 6: Final answer
    x = 4,568.43

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.