Home / 2,808.22-4,212.26-728.20

Finding the Fourth Proportional to 2,808.22, 4,212.26 and 728.20

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Solution

The fourth proportional to 2,808.22, 4,212.26 and 728.20 is: 1,092.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.22 : 4,212.26 = 728.20 : x
  2. Step 2: Convert to fraction form
    2,808.22/4,212.26 = 728.20/x
  3. Step 3: Cross multiply
    2,808.22x = 4,212.26 × 728.20
  4. Step 4: Simplify right side
    2,808.22x = 3,067,367.73
  5. Step 5: Solve for x
    x = 3,067,367.73/2,808.22
  6. Step 6: Final answer
    x = 1,092.28

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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.