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Finding the Fourth Proportional to 347.72, 521.44 and 142.39

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Solution

The fourth proportional to 347.72, 521.44 and 142.39 is: 213.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.72 : 521.44 = 142.39 : x
  2. Step 2: Convert to fraction form
    347.72/521.44 = 142.39/x
  3. Step 3: Cross multiply
    347.72x = 521.44 × 142.39
  4. Step 4: Simplify right side
    347.72x = 74,247.84
  5. Step 5: Solve for x
    x = 74,247.84/347.72
  6. Step 6: Final answer
    x = 213.53

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