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Finding the Fourth Proportional to 672, 927.60 and 396

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Solution

The fourth proportional to 672, 927.60 and 396 is: 546.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    672 : 927.60 = 396 : x
  2. Step 2: Convert to fraction form
    672/927.60 = 396/x
  3. Step 3: Cross multiply
    672x = 927.60 × 396
  4. Step 4: Simplify right side
    672x = 367,329.60
  5. Step 5: Solve for x
    x = 367,329.60/672
  6. Step 6: Final answer
    x = 546.62

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