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Finding the Fourth Proportional to 258,978,831.40, 388,468,247.10 and 258,978,831.40

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Solution

The fourth proportional to 258,978,831.40, 388,468,247.10 and 258,978,831.40 is: 388,468,247.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,978,831.40 : 388,468,247.10 = 258,978,831.40 : x
  2. Step 2: Convert to fraction form
    258,978,831.40/388,468,247.10 = 258,978,831.40/x
  3. Step 3: Cross multiply
    258,978,831.40x = 388,468,247.10 × 258,978,831.40
  4. Step 4: Simplify right side
    258,978,831.40x = 100,605,052,669,964,448
  5. Step 5: Solve for x
    x = 100,605,052,669,964,448/258,978,831.40
  6. Step 6: Final answer
    x = 388,468,247.10

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