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Finding the Fourth Proportional to 329.79, 454.64 and 231.24

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Solution

The fourth proportional to 329.79, 454.64 and 231.24 is: 318.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.79 : 454.64 = 231.24 : x
  2. Step 2: Convert to fraction form
    329.79/454.64 = 231.24/x
  3. Step 3: Cross multiply
    329.79x = 454.64 × 231.24
  4. Step 4: Simplify right side
    329.79x = 105,129.80
  5. Step 5: Solve for x
    x = 105,129.80/329.79
  6. Step 6: Final answer
    x = 318.78

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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.