Home / 2,221.16-3,331.44-921.92

Finding the Fourth Proportional to 2,221.16, 3,331.44 and 921.92

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Solution

The fourth proportional to 2,221.16, 3,331.44 and 921.92 is: 1,382.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.16 : 3,331.44 = 921.92 : x
  2. Step 2: Convert to fraction form
    2,221.16/3,331.44 = 921.92/x
  3. Step 3: Cross multiply
    2,221.16x = 3,331.44 × 921.92
  4. Step 4: Simplify right side
    2,221.16x = 3,071,321.16
  5. Step 5: Solve for x
    x = 3,071,321.16/2,221.16
  6. Step 6: Final answer
    x = 1,382.76

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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.