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Finding the Fourth Proportional to 626.44, 863.96 and 478.80

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Solution

The fourth proportional to 626.44, 863.96 and 478.80 is: 660.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.44 : 863.96 = 478.80 : x
  2. Step 2: Convert to fraction form
    626.44/863.96 = 478.80/x
  3. Step 3: Cross multiply
    626.44x = 863.96 × 478.80
  4. Step 4: Simplify right side
    626.44x = 413,664.05
  5. Step 5: Solve for x
    x = 413,664.05/626.44
  6. Step 6: Final answer
    x = 660.34

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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.