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Finding the Fourth Proportional to 493.25, 680.03 and 387.94

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Solution

The fourth proportional to 493.25, 680.03 and 387.94 is: 534.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.25 : 680.03 = 387.94 : x
  2. Step 2: Convert to fraction form
    493.25/680.03 = 387.94/x
  3. Step 3: Cross multiply
    493.25x = 680.03 × 387.94
  4. Step 4: Simplify right side
    493.25x = 263,807.20
  5. Step 5: Solve for x
    x = 263,807.20/493.25
  6. Step 6: Final answer
    x = 534.83

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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.