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Finding the Fourth Proportional to 396.21, 591.53 and 357.33

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Solution

The fourth proportional to 396.21, 591.53 and 357.33 is: 533.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.21 : 591.53 = 357.33 : x
  2. Step 2: Convert to fraction form
    396.21/591.53 = 357.33/x
  3. Step 3: Cross multiply
    396.21x = 591.53 × 357.33
  4. Step 4: Simplify right side
    396.21x = 211,371.41
  5. Step 5: Solve for x
    x = 211,371.41/396.21
  6. Step 6: Final answer
    x = 533.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.