Home / 2,391.26-3,299.40-1,396.78

Finding the Fourth Proportional to 2,391.26, 3,299.40 and 1,396.78

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Solution

The fourth proportional to 2,391.26, 3,299.40 and 1,396.78 is: 1,927.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.26 : 3,299.40 = 1,396.78 : x
  2. Step 2: Convert to fraction form
    2,391.26/3,299.40 = 1,396.78/x
  3. Step 3: Cross multiply
    2,391.26x = 3,299.40 × 1,396.78
  4. Step 4: Simplify right side
    2,391.26x = 4,608,527.68
  5. Step 5: Solve for x
    x = 4,608,527.68/2,391.26
  6. Step 6: Final answer
    x = 1,927.24

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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.