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Finding the Fourth Proportional to 440.70, 660.78 and 166.68

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Solution

The fourth proportional to 440.70, 660.78 and 166.68 is: 249.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.70 : 660.78 = 166.68 : x
  2. Step 2: Convert to fraction form
    440.70/660.78 = 166.68/x
  3. Step 3: Cross multiply
    440.70x = 660.78 × 166.68
  4. Step 4: Simplify right side
    440.70x = 110,138.81
  5. Step 5: Solve for x
    x = 110,138.81/440.70
  6. Step 6: Final answer
    x = 249.92

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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.