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Finding the Fourth Proportional to 258,417.56, 356,616.25 and 145,240.31

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Solution

The fourth proportional to 258,417.56, 356,616.25 and 145,240.31 is: 200,431.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,417.56 : 356,616.25 = 145,240.31 : x
  2. Step 2: Convert to fraction form
    258,417.56/356,616.25 = 145,240.31/x
  3. Step 3: Cross multiply
    258,417.56x = 356,616.25 × 145,240.31
  4. Step 4: Simplify right side
    258,417.56x = 51,795,055,229.48
  5. Step 5: Solve for x
    x = 51,795,055,229.48/258,417.56
  6. Step 6: Final answer
    x = 200,431.64

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