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Finding the Fourth Proportional to 361.48, 499.08 and 255.39

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Solution

The fourth proportional to 361.48, 499.08 and 255.39 is: 352.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.48 : 499.08 = 255.39 : x
  2. Step 2: Convert to fraction form
    361.48/499.08 = 255.39/x
  3. Step 3: Cross multiply
    361.48x = 499.08 × 255.39
  4. Step 4: Simplify right side
    361.48x = 127,460.04
  5. Step 5: Solve for x
    x = 127,460.04/361.48
  6. Step 6: Final answer
    x = 352.61

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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.