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Finding the Fourth Proportional to 420,639.33, 580,479.28 and 229,652.73

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Solution

The fourth proportional to 420,639.33, 580,479.28 and 229,652.73 is: 316,919.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,639.33 : 580,479.28 = 229,652.73 : x
  2. Step 2: Convert to fraction form
    420,639.33/580,479.28 = 229,652.73/x
  3. Step 3: Cross multiply
    420,639.33x = 580,479.28 × 229,652.73
  4. Step 4: Simplify right side
    420,639.33x = 133,308,651,360.43
  5. Step 5: Solve for x
    x = 133,308,651,360.43/420,639.33
  6. Step 6: Final answer
    x = 316,919.13

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