Home / 2,219.80-3,331.17-921.27

Finding the Fourth Proportional to 2,219.80, 3,331.17 and 921.27

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Solution

The fourth proportional to 2,219.80, 3,331.17 and 921.27 is: 1,382.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.80 : 3,331.17 = 921.27 : x
  2. Step 2: Convert to fraction form
    2,219.80/3,331.17 = 921.27/x
  3. Step 3: Cross multiply
    2,219.80x = 3,331.17 × 921.27
  4. Step 4: Simplify right side
    2,219.80x = 3,068,902.38
  5. Step 5: Solve for x
    x = 3,068,902.38/2,219.80
  6. Step 6: Final answer
    x = 1,382.51

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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.