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Finding the Fourth Proportional to 205.57, 283.87 and 140.23

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Solution

The fourth proportional to 205.57, 283.87 and 140.23 is: 193.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.57 : 283.87 = 140.23 : x
  2. Step 2: Convert to fraction form
    205.57/283.87 = 140.23/x
  3. Step 3: Cross multiply
    205.57x = 283.87 × 140.23
  4. Step 4: Simplify right side
    205.57x = 39,807.09
  5. Step 5: Solve for x
    x = 39,807.09/205.57
  6. Step 6: Final answer
    x = 193.64

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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.