Home / 2,819.60-4,229.40-1,280.60

Finding the Fourth Proportional to 2,819.60, 4,229.40 and 1,280.60

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Solution

The fourth proportional to 2,819.60, 4,229.40 and 1,280.60 is: 1,920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.60 : 4,229.40 = 1,280.60 : x
  2. Step 2: Convert to fraction form
    2,819.60/4,229.40 = 1,280.60/x
  3. Step 3: Cross multiply
    2,819.60x = 4,229.40 × 1,280.60
  4. Step 4: Simplify right side
    2,819.60x = 5,416,169.64
  5. Step 5: Solve for x
    x = 5,416,169.64/2,819.60
  6. Step 6: Final answer
    x = 1,920.90

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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.