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Finding the Fourth Proportional to 331.34, 496.63 and 221.53

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Solution

The fourth proportional to 331.34, 496.63 and 221.53 is: 332.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.34 : 496.63 = 221.53 : x
  2. Step 2: Convert to fraction form
    331.34/496.63 = 221.53/x
  3. Step 3: Cross multiply
    331.34x = 496.63 × 221.53
  4. Step 4: Simplify right side
    331.34x = 110,016.65
  5. Step 5: Solve for x
    x = 110,016.65/331.34
  6. Step 6: Final answer
    x = 332.03

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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.