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Finding the Fourth Proportional to 359.20, 495.10 and 280.36

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Solution

The fourth proportional to 359.20, 495.10 and 280.36 is: 386.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.20 : 495.10 = 280.36 : x
  2. Step 2: Convert to fraction form
    359.20/495.10 = 280.36/x
  3. Step 3: Cross multiply
    359.20x = 495.10 × 280.36
  4. Step 4: Simplify right side
    359.20x = 138,804.30
  5. Step 5: Solve for x
    x = 138,804.30/359.20
  6. Step 6: Final answer
    x = 386.43

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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.