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Finding the Fourth Proportional to 429.41, 644.12 and 186.11

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Solution

The fourth proportional to 429.41, 644.12 and 186.11 is: 279.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.41 : 644.12 = 186.11 : x
  2. Step 2: Convert to fraction form
    429.41/644.12 = 186.11/x
  3. Step 3: Cross multiply
    429.41x = 644.12 × 186.11
  4. Step 4: Simplify right side
    429.41x = 119,877.17
  5. Step 5: Solve for x
    x = 119,877.17/429.41
  6. Step 6: Final answer
    x = 279.17

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