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Finding the Fourth Proportional to 440.47, 660.48 and 220.86

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Solution

The fourth proportional to 440.47, 660.48 and 220.86 is: 331.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.47 : 660.48 = 220.86 : x
  2. Step 2: Convert to fraction form
    440.47/660.48 = 220.86/x
  3. Step 3: Cross multiply
    440.47x = 660.48 × 220.86
  4. Step 4: Simplify right side
    440.47x = 145,873.61
  5. Step 5: Solve for x
    x = 145,873.61/440.47
  6. Step 6: Final answer
    x = 331.18

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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.