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Finding the Fourth Proportional to 205.58, 309.27 and 185.42

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Solution

The fourth proportional to 205.58, 309.27 and 185.42 is: 278.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.58 : 309.27 = 185.42 : x
  2. Step 2: Convert to fraction form
    205.58/309.27 = 185.42/x
  3. Step 3: Cross multiply
    205.58x = 309.27 × 185.42
  4. Step 4: Simplify right side
    205.58x = 57,344.84
  5. Step 5: Solve for x
    x = 57,344.84/205.58
  6. Step 6: Final answer
    x = 278.94

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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.