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Finding the Fourth Proportional to 386.07, 532.78 and 211.42

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Solution

The fourth proportional to 386.07, 532.78 and 211.42 is: 291.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.07 : 532.78 = 211.42 : x
  2. Step 2: Convert to fraction form
    386.07/532.78 = 211.42/x
  3. Step 3: Cross multiply
    386.07x = 532.78 × 211.42
  4. Step 4: Simplify right side
    386.07x = 112,640.35
  5. Step 5: Solve for x
    x = 112,640.35/386.07
  6. Step 6: Final answer
    x = 291.77

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