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Finding the Fourth Proportional to 393,697,998.40, 590,546,997.60 and 164,115,486.40

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Solution

The fourth proportional to 393,697,998.40, 590,546,997.60 and 164,115,486.40 is: 246,173,229.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,697,998.40 : 590,546,997.60 = 164,115,486.40 : x
  2. Step 2: Convert to fraction form
    393,697,998.40/590,546,997.60 = 164,115,486.40/x
  3. Step 3: Cross multiply
    393,697,998.40x = 590,546,997.60 × 164,115,486.40
  4. Step 4: Simplify right side
    393,697,998.40x = 96,917,907,753,183,648
  5. Step 5: Solve for x
    x = 96,917,907,753,183,648/393,697,998.40
  6. Step 6: Final answer
    x = 246,173,229.60

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.