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Finding the Fourth Proportional to 493.38, 680.89 and 283.56

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Solution

The fourth proportional to 493.38, 680.89 and 283.56 is: 391.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.38 : 680.89 = 283.56 : x
  2. Step 2: Convert to fraction form
    493.38/680.89 = 283.56/x
  3. Step 3: Cross multiply
    493.38x = 680.89 × 283.56
  4. Step 4: Simplify right side
    493.38x = 193,073.17
  5. Step 5: Solve for x
    x = 193,073.17/493.38
  6. Step 6: Final answer
    x = 391.33

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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.