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Finding the Fourth Proportional to 681,157, 940,025.84 and 379,351

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Solution

The fourth proportional to 681,157, 940,025.84 and 379,351 is: 523,520.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,157 : 940,025.84 = 379,351 : x
  2. Step 2: Convert to fraction form
    681,157/940,025.84 = 379,351/x
  3. Step 3: Cross multiply
    681,157x = 940,025.84 × 379,351
  4. Step 4: Simplify right side
    681,157x = 356,599,742,429.84
  5. Step 5: Solve for x
    x = 356,599,742,429.84/681,157
  6. Step 6: Final answer
    x = 523,520.63

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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.