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Finding the Fourth Proportional to 312.64, 468.65 and 231.84

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Solution

The fourth proportional to 312.64, 468.65 and 231.84 is: 347.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.64 : 468.65 = 231.84 : x
  2. Step 2: Convert to fraction form
    312.64/468.65 = 231.84/x
  3. Step 3: Cross multiply
    312.64x = 468.65 × 231.84
  4. Step 4: Simplify right side
    312.64x = 108,651.83
  5. Step 5: Solve for x
    x = 108,651.83/312.64
  6. Step 6: Final answer
    x = 347.53

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