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Finding the Fourth Proportional to 331.59, 457.49 and 221.03

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Solution

The fourth proportional to 331.59, 457.49 and 221.03 is: 304.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.59 : 457.49 = 221.03 : x
  2. Step 2: Convert to fraction form
    331.59/457.49 = 221.03/x
  3. Step 3: Cross multiply
    331.59x = 457.49 × 221.03
  4. Step 4: Simplify right side
    331.59x = 101,115.62
  5. Step 5: Solve for x
    x = 101,115.62/331.59
  6. Step 6: Final answer
    x = 304.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.