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Finding the Fourth Proportional to 634.20, 874.29 and 447.11

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Solution

The fourth proportional to 634.20, 874.29 and 447.11 is: 616.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.20 : 874.29 = 447.11 : x
  2. Step 2: Convert to fraction form
    634.20/874.29 = 447.11/x
  3. Step 3: Cross multiply
    634.20x = 874.29 × 447.11
  4. Step 4: Simplify right side
    634.20x = 390,903.80
  5. Step 5: Solve for x
    x = 390,903.80/634.20
  6. Step 6: Final answer
    x = 616.37

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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.