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Finding the Fourth Proportional to 387.84, 581.62 and 113.85

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Solution

The fourth proportional to 387.84, 581.62 and 113.85 is: 170.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.84 : 581.62 = 113.85 : x
  2. Step 2: Convert to fraction form
    387.84/581.62 = 113.85/x
  3. Step 3: Cross multiply
    387.84x = 581.62 × 113.85
  4. Step 4: Simplify right side
    387.84x = 66,217.44
  5. Step 5: Solve for x
    x = 66,217.44/387.84
  6. Step 6: Final answer
    x = 170.73

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