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Finding the Fourth Proportional to 316,906.38, 475,039.68 and 198,660.78

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Solution

The fourth proportional to 316,906.38, 475,039.68 and 198,660.78 is: 297,790.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,906.38 : 475,039.68 = 198,660.78 : x
  2. Step 2: Convert to fraction form
    316,906.38/475,039.68 = 198,660.78/x
  3. Step 3: Cross multiply
    316,906.38x = 475,039.68 × 198,660.78
  4. Step 4: Simplify right side
    316,906.38x = 94,371,753,359.75
  5. Step 5: Solve for x
    x = 94,371,753,359.75/316,906.38
  6. Step 6: Final answer
    x = 297,790.64

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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.