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Finding the Fourth Proportional to 681,414,855.15, 940,353,165.39 and 368,149,318.23

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Solution

The fourth proportional to 681,414,855.15, 940,353,165.39 and 368,149,318.23 is: 508,046,418.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,414,855.15 : 940,353,165.39 = 368,149,318.23 : x
  2. Step 2: Convert to fraction form
    681,414,855.15/940,353,165.39 = 368,149,318.23/x
  3. Step 3: Cross multiply
    681,414,855.15x = 940,353,165.39 × 368,149,318.23
  4. Step 4: Simplify right side
    681,414,855.15x = 346,190,376,733,750,976
  5. Step 5: Solve for x
    x = 346,190,376,733,750,976/681,414,855.15
  6. Step 6: Final answer
    x = 508,046,418.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.