Home / 2,819.70-4,229.55-1,260.45

Finding the Fourth Proportional to 2,819.70, 4,229.55 and 1,260.45

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Solution

The fourth proportional to 2,819.70, 4,229.55 and 1,260.45 is: 1,890.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.70 : 4,229.55 = 1,260.45 : x
  2. Step 2: Convert to fraction form
    2,819.70/4,229.55 = 1,260.45/x
  3. Step 3: Cross multiply
    2,819.70x = 4,229.55 × 1,260.45
  4. Step 4: Simplify right side
    2,819.70x = 5,331,136.30
  5. Step 5: Solve for x
    x = 5,331,136.30/2,819.70
  6. Step 6: Final answer
    x = 1,890.68

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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.