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Finding the Fourth Proportional to 2,489.70, 3,734.53 and 1,394.05

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Solution

The fourth proportional to 2,489.70, 3,734.53 and 1,394.05 is: 2,091.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.70 : 3,734.53 = 1,394.05 : x
  2. Step 2: Convert to fraction form
    2,489.70/3,734.53 = 1,394.05/x
  3. Step 3: Cross multiply
    2,489.70x = 3,734.53 × 1,394.05
  4. Step 4: Simplify right side
    2,489.70x = 5,206,121.55
  5. Step 5: Solve for x
    x = 5,206,121.55/2,489.70
  6. Step 6: Final answer
    x = 2,091.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.