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Finding the Fourth Proportional to 236.45, 324.99 and 208.65

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Solution

The fourth proportional to 236.45, 324.99 and 208.65 is: 286.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.45 : 324.99 = 208.65 : x
  2. Step 2: Convert to fraction form
    236.45/324.99 = 208.65/x
  3. Step 3: Cross multiply
    236.45x = 324.99 × 208.65
  4. Step 4: Simplify right side
    236.45x = 67,810.38
  5. Step 5: Solve for x
    x = 67,810.38/236.45
  6. Step 6: Final answer
    x = 286.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.