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Finding the Fourth Proportional to 361.88, 499.51 and 222.20

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Solution

The fourth proportional to 361.88, 499.51 and 222.20 is: 306.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.88 : 499.51 = 222.20 : x
  2. Step 2: Convert to fraction form
    361.88/499.51 = 222.20/x
  3. Step 3: Cross multiply
    361.88x = 499.51 × 222.20
  4. Step 4: Simplify right side
    361.88x = 110,991.85
  5. Step 5: Solve for x
    x = 110,991.85/361.88
  6. Step 6: Final answer
    x = 306.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.