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Finding the Fourth Proportional to 447.90, 671.77 and 274.50

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Solution

The fourth proportional to 447.90, 671.77 and 274.50 is: 411.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.90 : 671.77 = 274.50 : x
  2. Step 2: Convert to fraction form
    447.90/671.77 = 274.50/x
  3. Step 3: Cross multiply
    447.90x = 671.77 × 274.50
  4. Step 4: Simplify right side
    447.90x = 184,400.87
  5. Step 5: Solve for x
    x = 184,400.87/447.90
  6. Step 6: Final answer
    x = 411.71

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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.