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Finding the Fourth Proportional to 626.14, 863.89 and 393.27

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Solution

The fourth proportional to 626.14, 863.89 and 393.27 is: 542.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.14 : 863.89 = 393.27 : x
  2. Step 2: Convert to fraction form
    626.14/863.89 = 393.27/x
  3. Step 3: Cross multiply
    626.14x = 863.89 × 393.27
  4. Step 4: Simplify right side
    626.14x = 339,742.02
  5. Step 5: Solve for x
    x = 339,742.02/626.14
  6. Step 6: Final answer
    x = 542.60

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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.