Home / 3,928.80-5,891.40-1,736.40

Finding the Fourth Proportional to 3,928.80, 5,891.40 and 1,736.40

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Solution

The fourth proportional to 3,928.80, 5,891.40 and 1,736.40 is: 2,603.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.80 : 5,891.40 = 1,736.40 : x
  2. Step 2: Convert to fraction form
    3,928.80/5,891.40 = 1,736.40/x
  3. Step 3: Cross multiply
    3,928.80x = 5,891.40 × 1,736.40
  4. Step 4: Simplify right side
    3,928.80x = 10,229,826.96
  5. Step 5: Solve for x
    x = 10,229,826.96/3,928.80
  6. Step 6: Final answer
    x = 2,603.80

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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.