Home / 2,857.19-4,286.84-1,213.29

Finding the Fourth Proportional to 2,857.19, 4,286.84 and 1,213.29

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Solution

The fourth proportional to 2,857.19, 4,286.84 and 1,213.29 is: 1,820.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.19 : 4,286.84 = 1,213.29 : x
  2. Step 2: Convert to fraction form
    2,857.19/4,286.84 = 1,213.29/x
  3. Step 3: Cross multiply
    2,857.19x = 4,286.84 × 1,213.29
  4. Step 4: Simplify right side
    2,857.19x = 5,201,174.04
  5. Step 5: Solve for x
    x = 5,201,174.04/2,857.19
  6. Step 6: Final answer
    x = 1,820.38

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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.