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Finding the Fourth Proportional to 455.05, 627.96 and 258.55

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Solution

The fourth proportional to 455.05, 627.96 and 258.55 is: 356.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.05 : 627.96 = 258.55 : x
  2. Step 2: Convert to fraction form
    455.05/627.96 = 258.55/x
  3. Step 3: Cross multiply
    455.05x = 627.96 × 258.55
  4. Step 4: Simplify right side
    455.05x = 162,359.06
  5. Step 5: Solve for x
    x = 162,359.06/455.05
  6. Step 6: Final answer
    x = 356.79

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