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Finding the Fourth Proportional to 331.36, 457.23 and 220.66

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Solution

The fourth proportional to 331.36, 457.23 and 220.66 is: 304.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.36 : 457.23 = 220.66 : x
  2. Step 2: Convert to fraction form
    331.36/457.23 = 220.66/x
  3. Step 3: Cross multiply
    331.36x = 457.23 × 220.66
  4. Step 4: Simplify right side
    331.36x = 100,890.81
  5. Step 5: Solve for x
    x = 100,890.81/331.36
  6. Step 6: Final answer
    x = 304.48

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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.