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Finding the Fourth Proportional to 257.76, 386.79 and 154.83

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Solution

The fourth proportional to 257.76, 386.79 and 154.83 is: 232.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.76 : 386.79 = 154.83 : x
  2. Step 2: Convert to fraction form
    257.76/386.79 = 154.83/x
  3. Step 3: Cross multiply
    257.76x = 386.79 × 154.83
  4. Step 4: Simplify right side
    257.76x = 59,886.70
  5. Step 5: Solve for x
    x = 59,886.70/257.76
  6. Step 6: Final answer
    x = 232.34

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