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Finding the Fourth Proportional to 394.13, 591.17 and 105.56

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Solution

The fourth proportional to 394.13, 591.17 and 105.56 is: 158.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.13 : 591.17 = 105.56 : x
  2. Step 2: Convert to fraction form
    394.13/591.17 = 105.56/x
  3. Step 3: Cross multiply
    394.13x = 591.17 × 105.56
  4. Step 4: Simplify right side
    394.13x = 62,400.42
  5. Step 5: Solve for x
    x = 62,400.42/394.13
  6. Step 6: Final answer
    x = 158.33

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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.