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Finding the Fourth Proportional to 329.17, 454.13 and 287.73

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Solution

The fourth proportional to 329.17, 454.13 and 287.73 is: 396.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.17 : 454.13 = 287.73 : x
  2. Step 2: Convert to fraction form
    329.17/454.13 = 287.73/x
  3. Step 3: Cross multiply
    329.17x = 454.13 × 287.73
  4. Step 4: Simplify right side
    329.17x = 130,666.82
  5. Step 5: Solve for x
    x = 130,666.82/329.17
  6. Step 6: Final answer
    x = 396.96

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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.