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Finding the Fourth Proportional to 385.52, 578.32 and 129.04

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Solution

The fourth proportional to 385.52, 578.32 and 129.04 is: 193.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.52 : 578.32 = 129.04 : x
  2. Step 2: Convert to fraction form
    385.52/578.32 = 129.04/x
  3. Step 3: Cross multiply
    385.52x = 578.32 × 129.04
  4. Step 4: Simplify right side
    385.52x = 74,626.41
  5. Step 5: Solve for x
    x = 74,626.41/385.52
  6. Step 6: Final answer
    x = 193.57

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