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Finding the Fourth Proportional to 627,318,697.80, 940,978,046.70 and 320,508,841.80

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Solution

The fourth proportional to 627,318,697.80, 940,978,046.70 and 320,508,841.80 is: 480,763,262.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,318,697.80 : 940,978,046.70 = 320,508,841.80 : x
  2. Step 2: Convert to fraction form
    627,318,697.80/940,978,046.70 = 320,508,841.80/x
  3. Step 3: Cross multiply
    627,318,697.80x = 940,978,046.70 × 320,508,841.80
  4. Step 4: Simplify right side
    627,318,697.80x = 301,591,783,907,043,328
  5. Step 5: Solve for x
    x = 301,591,783,907,043,328/627,318,697.80
  6. Step 6: Final answer
    x = 480,763,262.70

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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.