Home / 2,221.12-3,332.22-921.88

Finding the Fourth Proportional to 2,221.12, 3,332.22 and 921.88

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Solution

The fourth proportional to 2,221.12, 3,332.22 and 921.88 is: 1,383.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.12 : 3,332.22 = 921.88 : x
  2. Step 2: Convert to fraction form
    2,221.12/3,332.22 = 921.88/x
  3. Step 3: Cross multiply
    2,221.12x = 3,332.22 × 921.88
  4. Step 4: Simplify right side
    2,221.12x = 3,071,906.97
  5. Step 5: Solve for x
    x = 3,071,906.97/2,221.12
  6. Step 6: Final answer
    x = 1,383.04

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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.