Home / 2,218.80-3,322.80-2,121.60

Finding the Fourth Proportional to 2,218.80, 3,322.80 and 2,121.60

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Solution

The fourth proportional to 2,218.80, 3,322.80 and 2,121.60 is: 3,177.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.80 : 3,322.80 = 2,121.60 : x
  2. Step 2: Convert to fraction form
    2,218.80/3,322.80 = 2,121.60/x
  3. Step 3: Cross multiply
    2,218.80x = 3,322.80 × 2,121.60
  4. Step 4: Simplify right side
    2,218.80x = 7,049,652.48
  5. Step 5: Solve for x
    x = 7,049,652.48/2,218.80
  6. Step 6: Final answer
    x = 3,177.24

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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.