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Finding the Fourth Proportional to 217.08, 323.73 and 208.98

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Solution

The fourth proportional to 217.08, 323.73 and 208.98 is: 311.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.08 : 323.73 = 208.98 : x
  2. Step 2: Convert to fraction form
    217.08/323.73 = 208.98/x
  3. Step 3: Cross multiply
    217.08x = 323.73 × 208.98
  4. Step 4: Simplify right side
    217.08x = 67,653.10
  5. Step 5: Solve for x
    x = 67,653.10/217.08
  6. Step 6: Final answer
    x = 311.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.