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Finding the Fourth Proportional to 331.72, 457.81 and 226.77

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Solution

The fourth proportional to 331.72, 457.81 and 226.77 is: 312.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.72 : 457.81 = 226.77 : x
  2. Step 2: Convert to fraction form
    331.72/457.81 = 226.77/x
  3. Step 3: Cross multiply
    331.72x = 457.81 × 226.77
  4. Step 4: Simplify right side
    331.72x = 103,815.29
  5. Step 5: Solve for x
    x = 103,815.29/331.72
  6. Step 6: Final answer
    x = 312.96

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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.