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Finding the Fourth Proportional to 394.26, 591.13 and 220.94

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Solution

The fourth proportional to 394.26, 591.13 and 220.94 is: 331.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.26 : 591.13 = 220.94 : x
  2. Step 2: Convert to fraction form
    394.26/591.13 = 220.94/x
  3. Step 3: Cross multiply
    394.26x = 591.13 × 220.94
  4. Step 4: Simplify right side
    394.26x = 130,603.16
  5. Step 5: Solve for x
    x = 130,603.16/394.26
  6. Step 6: Final answer
    x = 331.27

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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.