Home / 3,928.80-5,420.40-2,250.24

Finding the Fourth Proportional to 3,928.80, 5,420.40 and 2,250.24

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Solution

The fourth proportional to 3,928.80, 5,420.40 and 2,250.24 is: 3,104.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.80 : 5,420.40 = 2,250.24 : x
  2. Step 2: Convert to fraction form
    3,928.80/5,420.40 = 2,250.24/x
  3. Step 3: Cross multiply
    3,928.80x = 5,420.40 × 2,250.24
  4. Step 4: Simplify right side
    3,928.80x = 12,197,200.90
  5. Step 5: Solve for x
    x = 12,197,200.90/3,928.80
  6. Step 6: Final answer
    x = 3,104.56

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1.5x scale

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.