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Finding the Fourth Proportional to 319.02, 478.56 and 136.46

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Solution

The fourth proportional to 319.02, 478.56 and 136.46 is: 204.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.02 : 478.56 = 136.46 : x
  2. Step 2: Convert to fraction form
    319.02/478.56 = 136.46/x
  3. Step 3: Cross multiply
    319.02x = 478.56 × 136.46
  4. Step 4: Simplify right side
    319.02x = 65,304.30
  5. Step 5: Solve for x
    x = 65,304.30/319.02
  6. Step 6: Final answer
    x = 204.70

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