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Finding the Fourth Proportional to 663.76, 996.18 and 479.44

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Solution

The fourth proportional to 663.76, 996.18 and 479.44 is: 719.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.76 : 996.18 = 479.44 : x
  2. Step 2: Convert to fraction form
    663.76/996.18 = 479.44/x
  3. Step 3: Cross multiply
    663.76x = 996.18 × 479.44
  4. Step 4: Simplify right side
    663.76x = 477,608.54
  5. Step 5: Solve for x
    x = 477,608.54/663.76
  6. Step 6: Final answer
    x = 719.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.