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Finding the Fourth Proportional to 205.49, 283.57 and 125.71

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Solution

The fourth proportional to 205.49, 283.57 and 125.71 is: 173.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.49 : 283.57 = 125.71 : x
  2. Step 2: Convert to fraction form
    205.49/283.57 = 125.71/x
  3. Step 3: Cross multiply
    205.49x = 283.57 × 125.71
  4. Step 4: Simplify right side
    205.49x = 35,648.86
  5. Step 5: Solve for x
    x = 35,648.86/205.49
  6. Step 6: Final answer
    x = 173.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.