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Finding the Fourth Proportional to 421,115,997.60, 631,673,996.40 and 421,115,997.60

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Solution

The fourth proportional to 421,115,997.60, 631,673,996.40 and 421,115,997.60 is: 631,673,996.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,115,997.60 : 631,673,996.40 = 421,115,997.60 : x
  2. Step 2: Convert to fraction form
    421,115,997.60/631,673,996.40 = 421,115,997.60/x
  3. Step 3: Cross multiply
    421,115,997.60x = 631,673,996.40 × 421,115,997.60
  4. Step 4: Simplify right side
    421,115,997.60x = 266,008,025,151,964,800
  5. Step 5: Solve for x
    x = 266,008,025,151,964,800/421,115,997.60
  6. Step 6: Final answer
    x = 631,673,996.40

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Why These Related Problems?

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