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Finding the Fourth Proportional to 405,978,375.60, 608,967,563.40 and 405,978,375.60

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Solution

The fourth proportional to 405,978,375.60, 608,967,563.40 and 405,978,375.60 is: 608,967,563.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,978,375.60 : 608,967,563.40 = 405,978,375.60 : x
  2. Step 2: Convert to fraction form
    405,978,375.60/608,967,563.40 = 405,978,375.60/x
  3. Step 3: Cross multiply
    405,978,375.60x = 608,967,563.40 × 405,978,375.60
  4. Step 4: Simplify right side
    405,978,375.60x = 247,227,662,182,222,016
  5. Step 5: Solve for x
    x = 247,227,662,182,222,016/405,978,375.60
  6. Step 6: Final answer
    x = 608,967,563.40

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