Home / 3,212.70-4,819.05-2,103.90

Finding the Fourth Proportional to 3,212.70, 4,819.05 and 2,103.90

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Solution

The fourth proportional to 3,212.70, 4,819.05 and 2,103.90 is: 3,155.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.70 : 4,819.05 = 2,103.90 : x
  2. Step 2: Convert to fraction form
    3,212.70/4,819.05 = 2,103.90/x
  3. Step 3: Cross multiply
    3,212.70x = 4,819.05 × 2,103.90
  4. Step 4: Simplify right side
    3,212.70x = 10,138,799.30
  5. Step 5: Solve for x
    x = 10,138,799.30/3,212.70
  6. Step 6: Final answer
    x = 3,155.85

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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.