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Finding the Fourth Proportional to 415.31, 623.03 and 171.70

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Solution

The fourth proportional to 415.31, 623.03 and 171.70 is: 257.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.31 : 623.03 = 171.70 : x
  2. Step 2: Convert to fraction form
    415.31/623.03 = 171.70/x
  3. Step 3: Cross multiply
    415.31x = 623.03 × 171.70
  4. Step 4: Simplify right side
    415.31x = 106,974.25
  5. Step 5: Solve for x
    x = 106,974.25/415.31
  6. Step 6: Final answer
    x = 257.58

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