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Finding the Fourth Proportional to 440.52, 660.69 and 323.88

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Solution

The fourth proportional to 440.52, 660.69 and 323.88 is: 485.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.52 : 660.69 = 323.88 : x
  2. Step 2: Convert to fraction form
    440.52/660.69 = 323.88/x
  3. Step 3: Cross multiply
    440.52x = 660.69 × 323.88
  4. Step 4: Simplify right side
    440.52x = 213,981.80
  5. Step 5: Solve for x
    x = 213,981.80/440.52
  6. Step 6: Final answer
    x = 485.75

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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.