Home / 2,857.78-4,286.66-1,876.79

Finding the Fourth Proportional to 2,857.78, 4,286.66 and 1,876.79

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Solution

The fourth proportional to 2,857.78, 4,286.66 and 1,876.79 is: 2,815.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.78 : 4,286.66 = 1,876.79 : x
  2. Step 2: Convert to fraction form
    2,857.78/4,286.66 = 1,876.79/x
  3. Step 3: Cross multiply
    2,857.78x = 4,286.66 × 1,876.79
  4. Step 4: Simplify right side
    2,857.78x = 8,045,143.88
  5. Step 5: Solve for x
    x = 8,045,143.88/2,857.78
  6. Step 6: Final answer
    x = 2,815.18

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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.