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Finding the Fourth Proportional to 419,903,999.60, 629,855,999.40 and 265,715,250.80

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Solution

The fourth proportional to 419,903,999.60, 629,855,999.40 and 265,715,250.80 is: 398,572,876.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,903,999.60 : 629,855,999.40 = 265,715,250.80 : x
  2. Step 2: Convert to fraction form
    419,903,999.60/629,855,999.40 = 265,715,250.80/x
  3. Step 3: Cross multiply
    419,903,999.60x = 629,855,999.40 × 265,715,250.80
  4. Step 4: Simplify right side
    419,903,999.60x = 167,362,344,848,455,648
  5. Step 5: Solve for x
    x = 167,362,344,848,455,648/419,903,999.60
  6. Step 6: Final answer
    x = 398,572,876.20

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