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Finding the Fourth Proportional to 440.08, 660.35 and 220.74

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Solution

The fourth proportional to 440.08, 660.35 and 220.74 is: 331.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.08 : 660.35 = 220.74 : x
  2. Step 2: Convert to fraction form
    440.08/660.35 = 220.74/x
  3. Step 3: Cross multiply
    440.08x = 660.35 × 220.74
  4. Step 4: Simplify right side
    440.08x = 145,765.66
  5. Step 5: Solve for x
    x = 145,765.66/440.08
  6. Step 6: Final answer
    x = 331.23

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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.