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Finding the Fourth Proportional to 683.92, 943.68 and 404.09

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Solution

The fourth proportional to 683.92, 943.68 and 404.09 is: 557.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.92 : 943.68 = 404.09 : x
  2. Step 2: Convert to fraction form
    683.92/943.68 = 404.09/x
  3. Step 3: Cross multiply
    683.92x = 943.68 × 404.09
  4. Step 4: Simplify right side
    683.92x = 381,324.91
  5. Step 5: Solve for x
    x = 381,324.91/683.92
  6. Step 6: Final answer
    x = 557.56

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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.