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Finding the Fourth Proportional to 426.64, 640.04 and 152.76

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Solution

The fourth proportional to 426.64, 640.04 and 152.76 is: 229.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.64 : 640.04 = 152.76 : x
  2. Step 2: Convert to fraction form
    426.64/640.04 = 152.76/x
  3. Step 3: Cross multiply
    426.64x = 640.04 × 152.76
  4. Step 4: Simplify right side
    426.64x = 97,772.51
  5. Step 5: Solve for x
    x = 97,772.51/426.64
  6. Step 6: Final answer
    x = 229.17

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