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Finding the Fourth Proportional to 440.20, 659.40 and 331.66

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Solution

The fourth proportional to 440.20, 659.40 and 331.66 is: 496.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.20 : 659.40 = 331.66 : x
  2. Step 2: Convert to fraction form
    440.20/659.40 = 331.66/x
  3. Step 3: Cross multiply
    440.20x = 659.40 × 331.66
  4. Step 4: Simplify right side
    440.20x = 218,696.60
  5. Step 5: Solve for x
    x = 218,696.60/440.20
  6. Step 6: Final answer
    x = 496.81

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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.