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Finding the Fourth Proportional to 415.82, 623.21 and 172.10

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Solution

The fourth proportional to 415.82, 623.21 and 172.10 is: 257.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.82 : 623.21 = 172.10 : x
  2. Step 2: Convert to fraction form
    415.82/623.21 = 172.10/x
  3. Step 3: Cross multiply
    415.82x = 623.21 × 172.10
  4. Step 4: Simplify right side
    415.82x = 107,250.46
  5. Step 5: Solve for x
    x = 107,250.46/415.82
  6. Step 6: Final answer
    x = 257.93

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