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Finding the Fourth Proportional to 634.17, 874.92 and 447.98

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Solution

The fourth proportional to 634.17, 874.92 and 447.98 is: 618.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.17 : 874.92 = 447.98 : x
  2. Step 2: Convert to fraction form
    634.17/874.92 = 447.98/x
  3. Step 3: Cross multiply
    634.17x = 874.92 × 447.98
  4. Step 4: Simplify right side
    634.17x = 391,942.29
  5. Step 5: Solve for x
    x = 391,942.29/634.17
  6. Step 6: Final answer
    x = 618.04

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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.