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Finding the Fourth Proportional to 426.79, 639.95 and 152.84

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Solution

The fourth proportional to 426.79, 639.95 and 152.84 is: 229.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.79 : 639.95 = 152.84 : x
  2. Step 2: Convert to fraction form
    426.79/639.95 = 152.84/x
  3. Step 3: Cross multiply
    426.79x = 639.95 × 152.84
  4. Step 4: Simplify right side
    426.79x = 97,811.94
  5. Step 5: Solve for x
    x = 97,811.94/426.79
  6. Step 6: Final answer
    x = 229.18

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