Home / 1,928.55-2,891.39-1,380.39

Finding the Fourth Proportional to 1,928.55, 2,891.39 and 1,380.39

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Solution

The fourth proportional to 1,928.55, 2,891.39 and 1,380.39 is: 2,069.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.55 : 2,891.39 = 1,380.39 : x
  2. Step 2: Convert to fraction form
    1,928.55/2,891.39 = 1,380.39/x
  3. Step 3: Cross multiply
    1,928.55x = 2,891.39 × 1,380.39
  4. Step 4: Simplify right side
    1,928.55x = 3,991,238.94
  5. Step 5: Solve for x
    x = 3,991,238.94/1,928.55
  6. Step 6: Final answer
    x = 2,069.55

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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.