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Finding the Fourth Proportional to 388.26, 581.57 and 310.81

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Solution

The fourth proportional to 388.26, 581.57 and 310.81 is: 465.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.26 : 581.57 = 310.81 : x
  2. Step 2: Convert to fraction form
    388.26/581.57 = 310.81/x
  3. Step 3: Cross multiply
    388.26x = 581.57 × 310.81
  4. Step 4: Simplify right side
    388.26x = 180,757.77
  5. Step 5: Solve for x
    x = 180,757.77/388.26
  6. Step 6: Final answer
    x = 465.56

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