Home / 3,279.40-4,928.70-3,221.80

Finding the Fourth Proportional to 3,279.40, 4,928.70 and 3,221.80

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Solution

The fourth proportional to 3,279.40, 4,928.70 and 3,221.80 is: 4,842.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.40 : 4,928.70 = 3,221.80 : x
  2. Step 2: Convert to fraction form
    3,279.40/4,928.70 = 3,221.80/x
  3. Step 3: Cross multiply
    3,279.40x = 4,928.70 × 3,221.80
  4. Step 4: Simplify right side
    3,279.40x = 15,879,285.66
  5. Step 5: Solve for x
    x = 15,879,285.66/3,279.40
  6. Step 6: Final answer
    x = 4,842.13

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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.