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Finding the Fourth Proportional to 440.91, 661.23 and 163.21

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Solution

The fourth proportional to 440.91, 661.23 and 163.21 is: 244.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.91 : 661.23 = 163.21 : x
  2. Step 2: Convert to fraction form
    440.91/661.23 = 163.21/x
  3. Step 3: Cross multiply
    440.91x = 661.23 × 163.21
  4. Step 4: Simplify right side
    440.91x = 107,919.35
  5. Step 5: Solve for x
    x = 107,919.35/440.91
  6. Step 6: Final answer
    x = 244.77

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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.