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Finding the Fourth Proportional to 394.86, 591.57 and 291

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Solution

The fourth proportional to 394.86, 591.57 and 291 is: 435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.86 : 591.57 = 291 : x
  2. Step 2: Convert to fraction form
    394.86/591.57 = 291/x
  3. Step 3: Cross multiply
    394.86x = 591.57 × 291
  4. Step 4: Simplify right side
    394.86x = 172,146.87
  5. Step 5: Solve for x
    x = 172,146.87/394.86
  6. Step 6: Final answer
    x = 435.97

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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.