Home / 3,212-4,819.56-1,479.68

Finding the Fourth Proportional to 3,212, 4,819.56 and 1,479.68

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Solution

The fourth proportional to 3,212, 4,819.56 and 1,479.68 is: 2,220.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212 : 4,819.56 = 1,479.68 : x
  2. Step 2: Convert to fraction form
    3,212/4,819.56 = 1,479.68/x
  3. Step 3: Cross multiply
    3,212x = 4,819.56 × 1,479.68
  4. Step 4: Simplify right side
    3,212x = 7,131,406.54
  5. Step 5: Solve for x
    x = 7,131,406.54/3,212
  6. Step 6: Final answer
    x = 2,220.24

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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.