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Finding the Fourth Proportional to 328.71, 493.35 and 136.47

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Solution

The fourth proportional to 328.71, 493.35 and 136.47 is: 204.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.71 : 493.35 = 136.47 : x
  2. Step 2: Convert to fraction form
    328.71/493.35 = 136.47/x
  3. Step 3: Cross multiply
    328.71x = 493.35 × 136.47
  4. Step 4: Simplify right side
    328.71x = 67,327.47
  5. Step 5: Solve for x
    x = 67,327.47/328.71
  6. Step 6: Final answer
    x = 204.82

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