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Finding the Fourth Proportional to 440.40, 660.08 and 323.09

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Solution

The fourth proportional to 440.40, 660.08 and 323.09 is: 484.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.40 : 660.08 = 323.09 : x
  2. Step 2: Convert to fraction form
    440.40/660.08 = 323.09/x
  3. Step 3: Cross multiply
    440.40x = 660.08 × 323.09
  4. Step 4: Simplify right side
    440.40x = 213,265.23
  5. Step 5: Solve for x
    x = 213,265.23/440.40
  6. Step 6: Final answer
    x = 484.25

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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.