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Finding the Fourth Proportional to 669.12, 996.62 and 634.44

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Solution

The fourth proportional to 669.12, 996.62 and 634.44 is: 944.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.12 : 996.62 = 634.44 : x
  2. Step 2: Convert to fraction form
    669.12/996.62 = 634.44/x
  3. Step 3: Cross multiply
    669.12x = 996.62 × 634.44
  4. Step 4: Simplify right side
    669.12x = 632,295.59
  5. Step 5: Solve for x
    x = 632,295.59/669.12
  6. Step 6: Final answer
    x = 944.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.