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Finding the Fourth Proportional to 1,724.97, 2,380.48 and 939.02

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Solution

The fourth proportional to 1,724.97, 2,380.48 and 939.02 is: 1,295.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.97 : 2,380.48 = 939.02 : x
  2. Step 2: Convert to fraction form
    1,724.97/2,380.48 = 939.02/x
  3. Step 3: Cross multiply
    1,724.97x = 2,380.48 × 939.02
  4. Step 4: Simplify right side
    1,724.97x = 2,235,318.33
  5. Step 5: Solve for x
    x = 2,235,318.33/1,724.97
  6. Step 6: Final answer
    x = 1,295.86

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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.