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Finding the Fourth Proportional to 329.78, 454.53 and 255.96

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Solution

The fourth proportional to 329.78, 454.53 and 255.96 is: 352.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.78 : 454.53 = 255.96 : x
  2. Step 2: Convert to fraction form
    329.78/454.53 = 255.96/x
  3. Step 3: Cross multiply
    329.78x = 454.53 × 255.96
  4. Step 4: Simplify right side
    329.78x = 116,339.23
  5. Step 5: Solve for x
    x = 116,339.23/329.78
  6. Step 6: Final answer
    x = 352.78

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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.