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Finding the Fourth Proportional to 461.06, 690.99 and 172.22

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Solution

The fourth proportional to 461.06, 690.99 and 172.22 is: 258.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.06 : 690.99 = 172.22 : x
  2. Step 2: Convert to fraction form
    461.06/690.99 = 172.22/x
  3. Step 3: Cross multiply
    461.06x = 690.99 × 172.22
  4. Step 4: Simplify right side
    461.06x = 119,002.30
  5. Step 5: Solve for x
    x = 119,002.30/461.06
  6. Step 6: Final answer
    x = 258.11

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