Home / 3,279.20-4,910.70-2,631.20

Finding the Fourth Proportional to 3,279.20, 4,910.70 and 2,631.20

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Solution

The fourth proportional to 3,279.20, 4,910.70 and 2,631.20 is: 3,940.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.20 : 4,910.70 = 2,631.20 : x
  2. Step 2: Convert to fraction form
    3,279.20/4,910.70 = 2,631.20/x
  3. Step 3: Cross multiply
    3,279.20x = 4,910.70 × 2,631.20
  4. Step 4: Simplify right side
    3,279.20x = 12,921,033.84
  5. Step 5: Solve for x
    x = 12,921,033.84/3,279.20
  6. Step 6: Final answer
    x = 3,940.30

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1.5x scale

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.