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Finding the Fourth Proportional to 359.20, 495.60 and 281.44

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Solution

The fourth proportional to 359.20, 495.60 and 281.44 is: 388.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.20 : 495.60 = 281.44 : x
  2. Step 2: Convert to fraction form
    359.20/495.60 = 281.44/x
  3. Step 3: Cross multiply
    359.20x = 495.60 × 281.44
  4. Step 4: Simplify right side
    359.20x = 139,481.66
  5. Step 5: Solve for x
    x = 139,481.66/359.20
  6. Step 6: Final answer
    x = 388.31

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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.