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Finding the Fourth Proportional to 381.44, 524.80 and 329.60

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Solution

The fourth proportional to 381.44, 524.80 and 329.60 is: 453.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.44 : 524.80 = 329.60 : x
  2. Step 2: Convert to fraction form
    381.44/524.80 = 329.60/x
  3. Step 3: Cross multiply
    381.44x = 524.80 × 329.60
  4. Step 4: Simplify right side
    381.44x = 172,974.08
  5. Step 5: Solve for x
    x = 172,974.08/381.44
  6. Step 6: Final answer
    x = 453.48

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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.