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Finding the Fourth Proportional to 446.78, 669.41 and 272.91

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Solution

The fourth proportional to 446.78, 669.41 and 272.91 is: 408.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.78 : 669.41 = 272.91 : x
  2. Step 2: Convert to fraction form
    446.78/669.41 = 272.91/x
  3. Step 3: Cross multiply
    446.78x = 669.41 × 272.91
  4. Step 4: Simplify right side
    446.78x = 182,690.85
  5. Step 5: Solve for x
    x = 182,690.85/446.78
  6. Step 6: Final answer
    x = 408.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.