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Finding the Fourth Proportional to 605.70, 908.90 and 331.79

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Solution

The fourth proportional to 605.70, 908.90 and 331.79 is: 497.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.70 : 908.90 = 331.79 : x
  2. Step 2: Convert to fraction form
    605.70/908.90 = 331.79/x
  3. Step 3: Cross multiply
    605.70x = 908.90 × 331.79
  4. Step 4: Simplify right side
    605.70x = 301,557.73
  5. Step 5: Solve for x
    x = 301,557.73/605.70
  6. Step 6: Final answer
    x = 497.87

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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.