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Finding the Fourth Proportional to 431,438.80, 647,158.20 and 282,139.60

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Solution

The fourth proportional to 431,438.80, 647,158.20 and 282,139.60 is: 423,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,438.80 : 647,158.20 = 282,139.60 : x
  2. Step 2: Convert to fraction form
    431,438.80/647,158.20 = 282,139.60/x
  3. Step 3: Cross multiply
    431,438.80x = 647,158.20 × 282,139.60
  4. Step 4: Simplify right side
    431,438.80x = 182,588,955,684.72
  5. Step 5: Solve for x
    x = 182,588,955,684.72/431,438.80
  6. Step 6: Final answer
    x = 423,209.40

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