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Finding the Fourth Proportional to 258,978,740.40, 388,468,110.60 and 258,978,740.40

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Solution

The fourth proportional to 258,978,740.40, 388,468,110.60 and 258,978,740.40 is: 388,468,110.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,978,740.40 : 388,468,110.60 = 258,978,740.40 : x
  2. Step 2: Convert to fraction form
    258,978,740.40/388,468,110.60 = 258,978,740.40/x
  3. Step 3: Cross multiply
    258,978,740.40x = 388,468,110.60 × 258,978,740.40
  4. Step 4: Simplify right side
    258,978,740.40x = 100,604,981,968,755,904
  5. Step 5: Solve for x
    x = 100,604,981,968,755,904/258,978,740.40
  6. Step 6: Final answer
    x = 388,468,110.60

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