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Finding the Fourth Proportional to 440.08, 660.12 and 208.92

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Solution

The fourth proportional to 440.08, 660.12 and 208.92 is: 313.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.08 : 660.12 = 208.92 : x
  2. Step 2: Convert to fraction form
    440.08/660.12 = 208.92/x
  3. Step 3: Cross multiply
    440.08x = 660.12 × 208.92
  4. Step 4: Simplify right side
    440.08x = 137,912.27
  5. Step 5: Solve for x
    x = 137,912.27/440.08
  6. Step 6: Final answer
    x = 313.38

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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.