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Finding the Fourth Proportional to 329.44, 454.80 and 231.28

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Solution

The fourth proportional to 329.44, 454.80 and 231.28 is: 319.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.44 : 454.80 = 231.28 : x
  2. Step 2: Convert to fraction form
    329.44/454.80 = 231.28/x
  3. Step 3: Cross multiply
    329.44x = 454.80 × 231.28
  4. Step 4: Simplify right side
    329.44x = 105,186.14
  5. Step 5: Solve for x
    x = 105,186.14/329.44
  6. Step 6: Final answer
    x = 319.29

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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.