Home / 2,219.82-3,330.14-921.39

Finding the Fourth Proportional to 2,219.82, 3,330.14 and 921.39

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Solution

The fourth proportional to 2,219.82, 3,330.14 and 921.39 is: 1,382.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.82 : 3,330.14 = 921.39 : x
  2. Step 2: Convert to fraction form
    2,219.82/3,330.14 = 921.39/x
  3. Step 3: Cross multiply
    2,219.82x = 3,330.14 × 921.39
  4. Step 4: Simplify right side
    2,219.82x = 3,068,353.09
  5. Step 5: Solve for x
    x = 3,068,353.09/2,219.82
  6. Step 6: Final answer
    x = 1,382.25

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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.