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Finding the Fourth Proportional to 234.65, 323.78 and 208.53

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Solution

The fourth proportional to 234.65, 323.78 and 208.53 is: 287.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.65 : 323.78 = 208.53 : x
  2. Step 2: Convert to fraction form
    234.65/323.78 = 208.53/x
  3. Step 3: Cross multiply
    234.65x = 323.78 × 208.53
  4. Step 4: Simplify right side
    234.65x = 67,516.80
  5. Step 5: Solve for x
    x = 67,516.80/234.65
  6. Step 6: Final answer
    x = 287.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.