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Finding the Fourth Proportional to 447.80, 671.10 and 191

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Solution

The fourth proportional to 447.80, 671.10 and 191 is: 286.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.80 : 671.10 = 191 : x
  2. Step 2: Convert to fraction form
    447.80/671.10 = 191/x
  3. Step 3: Cross multiply
    447.80x = 671.10 × 191
  4. Step 4: Simplify right side
    447.80x = 128,180.10
  5. Step 5: Solve for x
    x = 128,180.10/447.80
  6. Step 6: Final answer
    x = 286.24

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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.