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Finding the Fourth Proportional to 205.50, 309.67 and 186.24

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Solution

The fourth proportional to 205.50, 309.67 and 186.24 is: 280.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.50 : 309.67 = 186.24 : x
  2. Step 2: Convert to fraction form
    205.50/309.67 = 186.24/x
  3. Step 3: Cross multiply
    205.50x = 309.67 × 186.24
  4. Step 4: Simplify right side
    205.50x = 57,672.94
  5. Step 5: Solve for x
    x = 57,672.94/205.50
  6. Step 6: Final answer
    x = 280.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.