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Finding the Fourth Proportional to 502.91, 693.49 and 397.83

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Solution

The fourth proportional to 502.91, 693.49 and 397.83 is: 548.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.91 : 693.49 = 397.83 : x
  2. Step 2: Convert to fraction form
    502.91/693.49 = 397.83/x
  3. Step 3: Cross multiply
    502.91x = 693.49 × 397.83
  4. Step 4: Simplify right side
    502.91x = 275,891.13
  5. Step 5: Solve for x
    x = 275,891.13/502.91
  6. Step 6: Final answer
    x = 548.59

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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.