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Finding the Fourth Proportional to 358.95, 538.43 and 142.53

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Solution

The fourth proportional to 358.95, 538.43 and 142.53 is: 213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.95 : 538.43 = 142.53 : x
  2. Step 2: Convert to fraction form
    358.95/538.43 = 142.53/x
  3. Step 3: Cross multiply
    358.95x = 538.43 × 142.53
  4. Step 4: Simplify right side
    358.95x = 76,743.79
  5. Step 5: Solve for x
    x = 76,743.79/358.95
  6. Step 6: Final answer
    x = 213.80

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