Home / 2,213.12-3,319.80-979.96

Finding the Fourth Proportional to 2,213.12, 3,319.80 and 979.96

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Solution

The fourth proportional to 2,213.12, 3,319.80 and 979.96 is: 1,469.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.12 : 3,319.80 = 979.96 : x
  2. Step 2: Convert to fraction form
    2,213.12/3,319.80 = 979.96/x
  3. Step 3: Cross multiply
    2,213.12x = 3,319.80 × 979.96
  4. Step 4: Simplify right side
    2,213.12x = 3,253,271.21
  5. Step 5: Solve for x
    x = 3,253,271.21/2,213.12
  6. Step 6: Final answer
    x = 1,469.99

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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.