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Finding the Fourth Proportional to 407,998.80, 611,998.20 and 396,334.80

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Solution

The fourth proportional to 407,998.80, 611,998.20 and 396,334.80 is: 594,502.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,998.80 : 611,998.20 = 396,334.80 : x
  2. Step 2: Convert to fraction form
    407,998.80/611,998.20 = 396,334.80/x
  3. Step 3: Cross multiply
    407,998.80x = 611,998.20 × 396,334.80
  4. Step 4: Simplify right side
    407,998.80x = 242,556,184,197.36
  5. Step 5: Solve for x
    x = 242,556,184,197.36/407,998.80
  6. Step 6: Final answer
    x = 594,502.20

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