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Finding the Fourth Proportional to 261.06, 391.28 and 200

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Solution

The fourth proportional to 261.06, 391.28 and 200 is: 299.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.06 : 391.28 = 200 : x
  2. Step 2: Convert to fraction form
    261.06/391.28 = 200/x
  3. Step 3: Cross multiply
    261.06x = 391.28 × 200
  4. Step 4: Simplify right side
    261.06x = 78,256
  5. Step 5: Solve for x
    x = 78,256/261.06
  6. Step 6: Final answer
    x = 299.76

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