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Finding the Fourth Proportional to 330.05, 494.84 and 220.37

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Solution

The fourth proportional to 330.05, 494.84 and 220.37 is: 330.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.05 : 494.84 = 220.37 : x
  2. Step 2: Convert to fraction form
    330.05/494.84 = 220.37/x
  3. Step 3: Cross multiply
    330.05x = 494.84 × 220.37
  4. Step 4: Simplify right side
    330.05x = 109,045.97
  5. Step 5: Solve for x
    x = 109,045.97/330.05
  6. Step 6: Final answer
    x = 330.39

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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.