Home / 2,205.20-3,308.10-818.20

Finding the Fourth Proportional to 2,205.20, 3,308.10 and 818.20

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Solution

The fourth proportional to 2,205.20, 3,308.10 and 818.20 is: 1,227.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.20 : 3,308.10 = 818.20 : x
  2. Step 2: Convert to fraction form
    2,205.20/3,308.10 = 818.20/x
  3. Step 3: Cross multiply
    2,205.20x = 3,308.10 × 818.20
  4. Step 4: Simplify right side
    2,205.20x = 2,706,687.42
  5. Step 5: Solve for x
    x = 2,706,687.42/2,205.20
  6. Step 6: Final answer
    x = 1,227.41

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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.