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Finding the Fourth Proportional to 391.24, 587.09 and 147.70

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Solution

The fourth proportional to 391.24, 587.09 and 147.70 is: 221.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.24 : 587.09 = 147.70 : x
  2. Step 2: Convert to fraction form
    391.24/587.09 = 147.70/x
  3. Step 3: Cross multiply
    391.24x = 587.09 × 147.70
  4. Step 4: Simplify right side
    391.24x = 86,712.45
  5. Step 5: Solve for x
    x = 86,712.45/391.24
  6. Step 6: Final answer
    x = 221.63

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