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Finding the Fourth Proportional to 396.20, 593.54 and 355.95

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Solution

The fourth proportional to 396.20, 593.54 and 355.95 is: 533.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.20 : 593.54 = 355.95 : x
  2. Step 2: Convert to fraction form
    396.20/593.54 = 355.95/x
  3. Step 3: Cross multiply
    396.20x = 593.54 × 355.95
  4. Step 4: Simplify right side
    396.20x = 211,268.78
  5. Step 5: Solve for x
    x = 211,268.78/396.20
  6. Step 6: Final answer
    x = 533.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.