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Finding the Fourth Proportional to 440.39, 660.08 and 166.31

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Solution

The fourth proportional to 440.39, 660.08 and 166.31 is: 249.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.39 : 660.08 = 166.31 : x
  2. Step 2: Convert to fraction form
    440.39/660.08 = 166.31/x
  3. Step 3: Cross multiply
    440.39x = 660.08 × 166.31
  4. Step 4: Simplify right side
    440.39x = 109,773.77
  5. Step 5: Solve for x
    x = 109,773.77/440.39
  6. Step 6: Final answer
    x = 249.27

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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.