Home / 2,222.80-3,067.32-1,291.12

Finding the Fourth Proportional to 2,222.80, 3,067.32 and 1,291.12

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Solution

The fourth proportional to 2,222.80, 3,067.32 and 1,291.12 is: 1,781.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,222.80 : 3,067.32 = 1,291.12 : x
  2. Step 2: Convert to fraction form
    2,222.80/3,067.32 = 1,291.12/x
  3. Step 3: Cross multiply
    2,222.80x = 3,067.32 × 1,291.12
  4. Step 4: Simplify right side
    2,222.80x = 3,960,278.20
  5. Step 5: Solve for x
    x = 3,960,278.20/2,222.80
  6. Step 6: Final answer
    x = 1,781.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.