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Finding the Fourth Proportional to 372.20, 557.82 and 209.97

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Solution

The fourth proportional to 372.20, 557.82 and 209.97 is: 314.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.20 : 557.82 = 209.97 : x
  2. Step 2: Convert to fraction form
    372.20/557.82 = 209.97/x
  3. Step 3: Cross multiply
    372.20x = 557.82 × 209.97
  4. Step 4: Simplify right side
    372.20x = 117,125.47
  5. Step 5: Solve for x
    x = 117,125.47/372.20
  6. Step 6: Final answer
    x = 314.69

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