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Finding the Fourth Proportional to 441.25, 661.79 and 163.57

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Solution

The fourth proportional to 441.25, 661.79 and 163.57 is: 245.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.25 : 661.79 = 163.57 : x
  2. Step 2: Convert to fraction form
    441.25/661.79 = 163.57/x
  3. Step 3: Cross multiply
    441.25x = 661.79 × 163.57
  4. Step 4: Simplify right side
    441.25x = 108,247.74
  5. Step 5: Solve for x
    x = 108,247.74/441.25
  6. Step 6: Final answer
    x = 245.32

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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.