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Finding the Fourth Proportional to 431,678.80, 647,149 and 165,630.25

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Solution

The fourth proportional to 431,678.80, 647,149 and 165,630.25 is: 248,303.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,678.80 : 647,149 = 165,630.25 : x
  2. Step 2: Convert to fraction form
    431,678.80/647,149 = 165,630.25/x
  3. Step 3: Cross multiply
    431,678.80x = 647,149 × 165,630.25
  4. Step 4: Simplify right side
    431,678.80x = 107,187,450,657.25
  5. Step 5: Solve for x
    x = 107,187,450,657.25/431,678.80
  6. Step 6: Final answer
    x = 248,303.72

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