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Finding the Fourth Proportional to 205.92, 306.80 and 203.91

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Solution

The fourth proportional to 205.92, 306.80 and 203.91 is: 303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.92 : 306.80 = 203.91 : x
  2. Step 2: Convert to fraction form
    205.92/306.80 = 203.91/x
  3. Step 3: Cross multiply
    205.92x = 306.80 × 203.91
  4. Step 4: Simplify right side
    205.92x = 62,558.57
  5. Step 5: Solve for x
    x = 62,558.57/205.92
  6. Step 6: Final answer
    x = 303.80

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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.