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Finding the Fourth Proportional to 440.36, 660.09 and 208.83

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Solution

The fourth proportional to 440.36, 660.09 and 208.83 is: 313.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.36 : 660.09 = 208.83 : x
  2. Step 2: Convert to fraction form
    440.36/660.09 = 208.83/x
  3. Step 3: Cross multiply
    440.36x = 660.09 × 208.83
  4. Step 4: Simplify right side
    440.36x = 137,846.59
  5. Step 5: Solve for x
    x = 137,846.59/440.36
  6. Step 6: Final answer
    x = 313.04

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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.