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Finding the Fourth Proportional to 331.10, 495.69 and 222.30

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Solution

The fourth proportional to 331.10, 495.69 and 222.30 is: 332.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.10 : 495.69 = 222.30 : x
  2. Step 2: Convert to fraction form
    331.10/495.69 = 222.30/x
  3. Step 3: Cross multiply
    331.10x = 495.69 × 222.30
  4. Step 4: Simplify right side
    331.10x = 110,191.89
  5. Step 5: Solve for x
    x = 110,191.89/331.10
  6. Step 6: Final answer
    x = 332.81

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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.