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Finding the Fourth Proportional to 399,435.58, 551,218.30 and 218,147.56

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Solution

The fourth proportional to 399,435.58, 551,218.30 and 218,147.56 is: 301,042.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,435.58 : 551,218.30 = 218,147.56 : x
  2. Step 2: Convert to fraction form
    399,435.58/551,218.30 = 218,147.56/x
  3. Step 3: Cross multiply
    399,435.58x = 551,218.30 × 218,147.56
  4. Step 4: Simplify right side
    399,435.58x = 120,246,927,172.35
  5. Step 5: Solve for x
    x = 120,246,927,172.35/399,435.58
  6. Step 6: Final answer
    x = 301,042.10

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