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Finding the Fourth Proportional to 329.43, 454.62 and 231.21

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Solution

The fourth proportional to 329.43, 454.62 and 231.21 is: 319.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.43 : 454.62 = 231.21 : x
  2. Step 2: Convert to fraction form
    329.43/454.62 = 231.21/x
  3. Step 3: Cross multiply
    329.43x = 454.62 × 231.21
  4. Step 4: Simplify right side
    329.43x = 105,112.69
  5. Step 5: Solve for x
    x = 105,112.69/329.43
  6. Step 6: Final answer
    x = 319.07

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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.