Home / 2,819.28-4,229.28-1,087.68

Finding the Fourth Proportional to 2,819.28, 4,229.28 and 1,087.68

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Solution

The fourth proportional to 2,819.28, 4,229.28 and 1,087.68 is: 1,631.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.28 : 4,229.28 = 1,087.68 : x
  2. Step 2: Convert to fraction form
    2,819.28/4,229.28 = 1,087.68/x
  3. Step 3: Cross multiply
    2,819.28x = 4,229.28 × 1,087.68
  4. Step 4: Simplify right side
    2,819.28x = 4,600,103.27
  5. Step 5: Solve for x
    x = 4,600,103.27/2,819.28
  6. Step 6: Final answer
    x = 1,631.66

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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.