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Finding the Fourth Proportional to 205.71, 308.52 and 61.39

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Solution

The fourth proportional to 205.71, 308.52 and 61.39 is: 92.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.71 : 308.52 = 61.39 : x
  2. Step 2: Convert to fraction form
    205.71/308.52 = 61.39/x
  3. Step 3: Cross multiply
    205.71x = 308.52 × 61.39
  4. Step 4: Simplify right side
    205.71x = 18,940.04
  5. Step 5: Solve for x
    x = 18,940.04/205.71
  6. Step 6: Final answer
    x = 92.07

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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.