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Finding the Fourth Proportional to 502.89, 694.65 and 393.73

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Solution

The fourth proportional to 502.89, 694.65 and 393.73 is: 543.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.89 : 694.65 = 393.73 : x
  2. Step 2: Convert to fraction form
    502.89/694.65 = 393.73/x
  3. Step 3: Cross multiply
    502.89x = 694.65 × 393.73
  4. Step 4: Simplify right side
    502.89x = 273,504.54
  5. Step 5: Solve for x
    x = 273,504.54/502.89
  6. Step 6: Final answer
    x = 543.87

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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.