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Finding the Fourth Proportional to 353.19, 529.78 and 144.91

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Solution

The fourth proportional to 353.19, 529.78 and 144.91 is: 217.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.19 : 529.78 = 144.91 : x
  2. Step 2: Convert to fraction form
    353.19/529.78 = 144.91/x
  3. Step 3: Cross multiply
    353.19x = 529.78 × 144.91
  4. Step 4: Simplify right side
    353.19x = 76,770.42
  5. Step 5: Solve for x
    x = 76,770.42/353.19
  6. Step 6: Final answer
    x = 217.36

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