Home / 3,621.20-5,431.80-2,238.80

Finding the Fourth Proportional to 3,621.20, 5,431.80 and 2,238.80

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Solution

The fourth proportional to 3,621.20, 5,431.80 and 2,238.80 is: 3,358.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.20 : 5,431.80 = 2,238.80 : x
  2. Step 2: Convert to fraction form
    3,621.20/5,431.80 = 2,238.80/x
  3. Step 3: Cross multiply
    3,621.20x = 5,431.80 × 2,238.80
  4. Step 4: Simplify right side
    3,621.20x = 12,160,713.84
  5. Step 5: Solve for x
    x = 12,160,713.84/3,621.20
  6. Step 6: Final answer
    x = 3,358.20

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1.5x scale

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.