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Finding the Fourth Proportional to 326,431.20, 488,998.80 and 287,464.80

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Solution

The fourth proportional to 326,431.20, 488,998.80 and 287,464.80 is: 430,626.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,431.20 : 488,998.80 = 287,464.80 : x
  2. Step 2: Convert to fraction form
    326,431.20/488,998.80 = 287,464.80/x
  3. Step 3: Cross multiply
    326,431.20x = 488,998.80 × 287,464.80
  4. Step 4: Simplify right side
    326,431.20x = 140,569,942,242.24
  5. Step 5: Solve for x
    x = 140,569,942,242.24/326,431.20
  6. Step 6: Final answer
    x = 430,626.55

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