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Finding the Fourth Proportional to 445.94, 669.11 and 172.23

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Solution

The fourth proportional to 445.94, 669.11 and 172.23 is: 258.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.94 : 669.11 = 172.23 : x
  2. Step 2: Convert to fraction form
    445.94/669.11 = 172.23/x
  3. Step 3: Cross multiply
    445.94x = 669.11 × 172.23
  4. Step 4: Simplify right side
    445.94x = 115,237.88
  5. Step 5: Solve for x
    x = 115,237.88/445.94
  6. Step 6: Final answer
    x = 258.41

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