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Finding the Fourth Proportional to 447.35, 672.21 and 274.05

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Solution

The fourth proportional to 447.35, 672.21 and 274.05 is: 411.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.35 : 672.21 = 274.05 : x
  2. Step 2: Convert to fraction form
    447.35/672.21 = 274.05/x
  3. Step 3: Cross multiply
    447.35x = 672.21 × 274.05
  4. Step 4: Simplify right side
    447.35x = 184,219.15
  5. Step 5: Solve for x
    x = 184,219.15/447.35
  6. Step 6: Final answer
    x = 411.81

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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.