Home / 2,819.21-4,198.99-2,670.98

Finding the Fourth Proportional to 2,819.21, 4,198.99 and 2,670.98

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Solution

The fourth proportional to 2,819.21, 4,198.99 and 2,670.98 is: 3,978.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.21 : 4,198.99 = 2,670.98 : x
  2. Step 2: Convert to fraction form
    2,819.21/4,198.99 = 2,670.98/x
  3. Step 3: Cross multiply
    2,819.21x = 4,198.99 × 2,670.98
  4. Step 4: Simplify right side
    2,819.21x = 11,215,416.40
  5. Step 5: Solve for x
    x = 11,215,416.40/2,819.21
  6. Step 6: Final answer
    x = 3,978.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.