Home / 2,216.80-3,326.28-1,120.78

Finding the Fourth Proportional to 2,216.80, 3,326.28 and 1,120.78

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Solution

The fourth proportional to 2,216.80, 3,326.28 and 1,120.78 is: 1,681.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.80 : 3,326.28 = 1,120.78 : x
  2. Step 2: Convert to fraction form
    2,216.80/3,326.28 = 1,120.78/x
  3. Step 3: Cross multiply
    2,216.80x = 3,326.28 × 1,120.78
  4. Step 4: Simplify right side
    2,216.80x = 3,728,028.10
  5. Step 5: Solve for x
    x = 3,728,028.10/2,216.80
  6. Step 6: Final answer
    x = 1,681.72

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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.