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Finding the Fourth Proportional to 205.40, 306.61 and 204.92

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Solution

The fourth proportional to 205.40, 306.61 and 204.92 is: 305.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.40 : 306.61 = 204.92 : x
  2. Step 2: Convert to fraction form
    205.40/306.61 = 204.92/x
  3. Step 3: Cross multiply
    205.40x = 306.61 × 204.92
  4. Step 4: Simplify right side
    205.40x = 62,830.52
  5. Step 5: Solve for x
    x = 62,830.52/205.40
  6. Step 6: Final answer
    x = 305.89

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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.