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Finding the Fourth Proportional to 344.78, 517.14 and 208.70

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Solution

The fourth proportional to 344.78, 517.14 and 208.70 is: 313.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.78 : 517.14 = 208.70 : x
  2. Step 2: Convert to fraction form
    344.78/517.14 = 208.70/x
  3. Step 3: Cross multiply
    344.78x = 517.14 × 208.70
  4. Step 4: Simplify right side
    344.78x = 107,924.53
  5. Step 5: Solve for x
    x = 107,924.53/344.78
  6. Step 6: Final answer
    x = 313.03

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