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Finding the Fourth Proportional to 386.07, 532.80 and 238.74

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Solution

The fourth proportional to 386.07, 532.80 and 238.74 is: 329.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.07 : 532.80 = 238.74 : x
  2. Step 2: Convert to fraction form
    386.07/532.80 = 238.74/x
  3. Step 3: Cross multiply
    386.07x = 532.80 × 238.74
  4. Step 4: Simplify right side
    386.07x = 127,200.67
  5. Step 5: Solve for x
    x = 127,200.67/386.07
  6. Step 6: Final answer
    x = 329.48

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