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Finding the Fourth Proportional to 361.78, 499.41 and 230.76

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Solution

The fourth proportional to 361.78, 499.41 and 230.76 is: 318.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.78 : 499.41 = 230.76 : x
  2. Step 2: Convert to fraction form
    361.78/499.41 = 230.76/x
  3. Step 3: Cross multiply
    361.78x = 499.41 × 230.76
  4. Step 4: Simplify right side
    361.78x = 115,243.85
  5. Step 5: Solve for x
    x = 115,243.85/361.78
  6. Step 6: Final answer
    x = 318.55

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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.