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Finding the Fourth Proportional to 633.88, 874.79 and 447.43

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Solution

The fourth proportional to 633.88, 874.79 and 447.43 is: 617.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.88 : 874.79 = 447.43 : x
  2. Step 2: Convert to fraction form
    633.88/874.79 = 447.43/x
  3. Step 3: Cross multiply
    633.88x = 874.79 × 447.43
  4. Step 4: Simplify right side
    633.88x = 391,407.29
  5. Step 5: Solve for x
    x = 391,407.29/633.88
  6. Step 6: Final answer
    x = 617.48

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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.