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Finding the Fourth Proportional to 447.09, 674.04 and 415.77

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Solution

The fourth proportional to 447.09, 674.04 and 415.77 is: 626.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.09 : 674.04 = 415.77 : x
  2. Step 2: Convert to fraction form
    447.09/674.04 = 415.77/x
  3. Step 3: Cross multiply
    447.09x = 674.04 × 415.77
  4. Step 4: Simplify right side
    447.09x = 280,245.61
  5. Step 5: Solve for x
    x = 280,245.61/447.09
  6. Step 6: Final answer
    x = 626.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.