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Finding the Fourth Proportional to 331.41, 457.73 and 220.69

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Solution

The fourth proportional to 331.41, 457.73 and 220.69 is: 304.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.41 : 457.73 = 220.69 : x
  2. Step 2: Convert to fraction form
    331.41/457.73 = 220.69/x
  3. Step 3: Cross multiply
    331.41x = 457.73 × 220.69
  4. Step 4: Simplify right side
    331.41x = 101,016.43
  5. Step 5: Solve for x
    x = 101,016.43/331.41
  6. Step 6: Final answer
    x = 304.81

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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.