Home / 2,857.20-4,286.24-1,213.75

Finding the Fourth Proportional to 2,857.20, 4,286.24 and 1,213.75

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Solution

The fourth proportional to 2,857.20, 4,286.24 and 1,213.75 is: 1,820.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.20 : 4,286.24 = 1,213.75 : x
  2. Step 2: Convert to fraction form
    2,857.20/4,286.24 = 1,213.75/x
  3. Step 3: Cross multiply
    2,857.20x = 4,286.24 × 1,213.75
  4. Step 4: Simplify right side
    2,857.20x = 5,202,423.80
  5. Step 5: Solve for x
    x = 5,202,423.80/2,857.20
  6. Step 6: Final answer
    x = 1,820.81

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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.