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Finding the Fourth Proportional to 361.80, 499.30 and 230.80

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Solution

The fourth proportional to 361.80, 499.30 and 230.80 is: 318.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.80 : 499.30 = 230.80 : x
  2. Step 2: Convert to fraction form
    361.80/499.30 = 230.80/x
  3. Step 3: Cross multiply
    361.80x = 499.30 × 230.80
  4. Step 4: Simplify right side
    361.80x = 115,238.44
  5. Step 5: Solve for x
    x = 115,238.44/361.80
  6. Step 6: Final answer
    x = 318.51

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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.