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Finding the Fourth Proportional to 394.75, 591.64 and 163.50

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Solution

The fourth proportional to 394.75, 591.64 and 163.50 is: 245.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.75 : 591.64 = 163.50 : x
  2. Step 2: Convert to fraction form
    394.75/591.64 = 163.50/x
  3. Step 3: Cross multiply
    394.75x = 591.64 × 163.50
  4. Step 4: Simplify right side
    394.75x = 96,733.14
  5. Step 5: Solve for x
    x = 96,733.14/394.75
  6. Step 6: Final answer
    x = 245.05

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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.