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Finding the Fourth Proportional to 358,709,660.80, 538,064,491.20 and 271,978,489.60

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Solution

The fourth proportional to 358,709,660.80, 538,064,491.20 and 271,978,489.60 is: 407,967,734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,709,660.80 : 538,064,491.20 = 271,978,489.60 : x
  2. Step 2: Convert to fraction form
    358,709,660.80/538,064,491.20 = 271,978,489.60/x
  3. Step 3: Cross multiply
    358,709,660.80x = 538,064,491.20 × 271,978,489.60
  4. Step 4: Simplify right side
    358,709,660.80x = 146,341,967,623,968,512
  5. Step 5: Solve for x
    x = 146,341,967,623,968,512/358,709,660.80
  6. Step 6: Final answer
    x = 407,967,734.40

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