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Finding the Fourth Proportional to 329.82, 455.31 and 226.86

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Solution

The fourth proportional to 329.82, 455.31 and 226.86 is: 313.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.82 : 455.31 = 226.86 : x
  2. Step 2: Convert to fraction form
    329.82/455.31 = 226.86/x
  3. Step 3: Cross multiply
    329.82x = 455.31 × 226.86
  4. Step 4: Simplify right side
    329.82x = 103,291.63
  5. Step 5: Solve for x
    x = 103,291.63/329.82
  6. Step 6: Final answer
    x = 313.18

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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.