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Finding the Fourth Proportional to 520,660.13, 780,691.30 and 204,944.81

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Solution

The fourth proportional to 520,660.13, 780,691.30 and 204,944.81 is: 307,299.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,660.13 : 780,691.30 = 204,944.81 : x
  2. Step 2: Convert to fraction form
    520,660.13/780,691.30 = 204,944.81/x
  3. Step 3: Cross multiply
    520,660.13x = 780,691.30 × 204,944.81
  4. Step 4: Simplify right side
    520,660.13x = 159,998,625,731.33
  5. Step 5: Solve for x
    x = 159,998,625,731.33/520,660.13
  6. Step 6: Final answer
    x = 307,299.56

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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.