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Finding the Fourth Proportional to 642, 885.96 and 380.24

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Solution

The fourth proportional to 642, 885.96 and 380.24 is: 524.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    642 : 885.96 = 380.24 : x
  2. Step 2: Convert to fraction form
    642/885.96 = 380.24/x
  3. Step 3: Cross multiply
    642x = 885.96 × 380.24
  4. Step 4: Simplify right side
    642x = 336,877.43
  5. Step 5: Solve for x
    x = 336,877.43/642
  6. Step 6: Final answer
    x = 524.73

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