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Finding the Fourth Proportional to 440.81, 661.22 and 166.90

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Solution

The fourth proportional to 440.81, 661.22 and 166.90 is: 250.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.81 : 661.22 = 166.90 : x
  2. Step 2: Convert to fraction form
    440.81/661.22 = 166.90/x
  3. Step 3: Cross multiply
    440.81x = 661.22 × 166.90
  4. Step 4: Simplify right side
    440.81x = 110,357.62
  5. Step 5: Solve for x
    x = 110,357.62/440.81
  6. Step 6: Final answer
    x = 250.35

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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.