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Finding the Fourth Proportional to 396.79, 595.40 and 266.85

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Solution

The fourth proportional to 396.79, 595.40 and 266.85 is: 400.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.79 : 595.40 = 266.85 : x
  2. Step 2: Convert to fraction form
    396.79/595.40 = 266.85/x
  3. Step 3: Cross multiply
    396.79x = 595.40 × 266.85
  4. Step 4: Simplify right side
    396.79x = 158,881.67
  5. Step 5: Solve for x
    x = 158,881.67/396.79
  6. Step 6: Final answer
    x = 400.42

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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.