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Finding the Fourth Proportional to 356.24, 490.92 and 239.60

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Solution

The fourth proportional to 356.24, 490.92 and 239.60 is: 330.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.24 : 490.92 = 239.60 : x
  2. Step 2: Convert to fraction form
    356.24/490.92 = 239.60/x
  3. Step 3: Cross multiply
    356.24x = 490.92 × 239.60
  4. Step 4: Simplify right side
    356.24x = 117,624.43
  5. Step 5: Solve for x
    x = 117,624.43/356.24
  6. Step 6: Final answer
    x = 330.18

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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.