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Finding the Fourth Proportional to 355.85, 533.35 and 209.68

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Solution

The fourth proportional to 355.85, 533.35 and 209.68 is: 314.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.85 : 533.35 = 209.68 : x
  2. Step 2: Convert to fraction form
    355.85/533.35 = 209.68/x
  3. Step 3: Cross multiply
    355.85x = 533.35 × 209.68
  4. Step 4: Simplify right side
    355.85x = 111,832.83
  5. Step 5: Solve for x
    x = 111,832.83/355.85
  6. Step 6: Final answer
    x = 314.27

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