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Finding the Fourth Proportional to 605.38, 908.47 and 220.63

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Solution

The fourth proportional to 605.38, 908.47 and 220.63 is: 331.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.38 : 908.47 = 220.63 : x
  2. Step 2: Convert to fraction form
    605.38/908.47 = 220.63/x
  3. Step 3: Cross multiply
    605.38x = 908.47 × 220.63
  4. Step 4: Simplify right side
    605.38x = 200,431.19
  5. Step 5: Solve for x
    x = 200,431.19/605.38
  6. Step 6: Final answer
    x = 331.09

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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.