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Finding the Fourth Proportional to 681,236.48, 940,009.92 and 386,876

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Solution

The fourth proportional to 681,236.48, 940,009.92 and 386,876 is: 533,834.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,236.48 : 940,009.92 = 386,876 : x
  2. Step 2: Convert to fraction form
    681,236.48/940,009.92 = 386,876/x
  3. Step 3: Cross multiply
    681,236.48x = 940,009.92 × 386,876
  4. Step 4: Simplify right side
    681,236.48x = 363,667,277,809.92
  5. Step 5: Solve for x
    x = 363,667,277,809.92/681,236.48
  6. Step 6: Final answer
    x = 533,834.12

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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.