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Finding the Fourth Proportional to 394.55, 591.76 and 134.54

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Solution

The fourth proportional to 394.55, 591.76 and 134.54 is: 201.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.55 : 591.76 = 134.54 : x
  2. Step 2: Convert to fraction form
    394.55/591.76 = 134.54/x
  3. Step 3: Cross multiply
    394.55x = 591.76 × 134.54
  4. Step 4: Simplify right side
    394.55x = 79,615.39
  5. Step 5: Solve for x
    x = 79,615.39/394.55
  6. Step 6: Final answer
    x = 201.79

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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.