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Finding the Fourth Proportional to 312.30, 468.18 and 165.72

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Solution

The fourth proportional to 312.30, 468.18 and 165.72 is: 248.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.30 : 468.18 = 165.72 : x
  2. Step 2: Convert to fraction form
    312.30/468.18 = 165.72/x
  3. Step 3: Cross multiply
    312.30x = 468.18 × 165.72
  4. Step 4: Simplify right side
    312.30x = 77,586.79
  5. Step 5: Solve for x
    x = 77,586.79/312.30
  6. Step 6: Final answer
    x = 248.44

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