Home / 3,213.20-4,819.75-1,021.90

Finding the Fourth Proportional to 3,213.20, 4,819.75 and 1,021.90

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Solution

The fourth proportional to 3,213.20, 4,819.75 and 1,021.90 is: 1,532.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.20 : 4,819.75 = 1,021.90 : x
  2. Step 2: Convert to fraction form
    3,213.20/4,819.75 = 1,021.90/x
  3. Step 3: Cross multiply
    3,213.20x = 4,819.75 × 1,021.90
  4. Step 4: Simplify right side
    3,213.20x = 4,925,302.71
  5. Step 5: Solve for x
    x = 4,925,302.71/3,213.20
  6. Step 6: Final answer
    x = 1,532.83

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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.