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Finding the Fourth Proportional to 361.98, 499.77 and 255.89

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Solution

The fourth proportional to 361.98, 499.77 and 255.89 is: 353.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.98 : 499.77 = 255.89 : x
  2. Step 2: Convert to fraction form
    361.98/499.77 = 255.89/x
  3. Step 3: Cross multiply
    361.98x = 499.77 × 255.89
  4. Step 4: Simplify right side
    361.98x = 127,883.65
  5. Step 5: Solve for x
    x = 127,883.65/361.98
  6. Step 6: Final answer
    x = 353.29

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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.