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Finding the Fourth Proportional to 1,724.92, 2,380.39 and 938.97

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Solution

The fourth proportional to 1,724.92, 2,380.39 and 938.97 is: 1,295.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.92 : 2,380.39 = 938.97 : x
  2. Step 2: Convert to fraction form
    1,724.92/2,380.39 = 938.97/x
  3. Step 3: Cross multiply
    1,724.92x = 2,380.39 × 938.97
  4. Step 4: Simplify right side
    1,724.92x = 2,235,114.80
  5. Step 5: Solve for x
    x = 2,235,114.80/1,724.92
  6. Step 6: Final answer
    x = 1,295.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.