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Finding the Fourth Proportional to 396.86, 595.35 and 122.90

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Solution

The fourth proportional to 396.86, 595.35 and 122.90 is: 184.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.86 : 595.35 = 122.90 : x
  2. Step 2: Convert to fraction form
    396.86/595.35 = 122.90/x
  3. Step 3: Cross multiply
    396.86x = 595.35 × 122.90
  4. Step 4: Simplify right side
    396.86x = 73,170.00
  5. Step 5: Solve for x
    x = 73,170.00/396.86
  6. Step 6: Final answer
    x = 184.37

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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.