Home / 4,198.40-6,290.40-2,221.10

Finding the Fourth Proportional to 4,198.40, 6,290.40 and 2,221.10

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Solution

The fourth proportional to 4,198.40, 6,290.40 and 2,221.10 is: 3,327.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,198.40 : 6,290.40 = 2,221.10 : x
  2. Step 2: Convert to fraction form
    4,198.40/6,290.40 = 2,221.10/x
  3. Step 3: Cross multiply
    4,198.40x = 6,290.40 × 2,221.10
  4. Step 4: Simplify right side
    4,198.40x = 13,971,607.44
  5. Step 5: Solve for x
    x = 13,971,607.44/4,198.40
  6. Step 6: Final answer
    x = 3,327.84

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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.