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Finding the Fourth Proportional to 396.83, 544.59 and 355.59

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Solution

The fourth proportional to 396.83, 544.59 and 355.59 is: 487.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.83 : 544.59 = 355.59 : x
  2. Step 2: Convert to fraction form
    396.83/544.59 = 355.59/x
  3. Step 3: Cross multiply
    396.83x = 544.59 × 355.59
  4. Step 4: Simplify right side
    396.83x = 193,650.76
  5. Step 5: Solve for x
    x = 193,650.76/396.83
  6. Step 6: Final answer
    x = 487.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.