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Finding the Fourth Proportional to 205.70, 284.04 and 140.36

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Solution

The fourth proportional to 205.70, 284.04 and 140.36 is: 193.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.70 : 284.04 = 140.36 : x
  2. Step 2: Convert to fraction form
    205.70/284.04 = 140.36/x
  3. Step 3: Cross multiply
    205.70x = 284.04 × 140.36
  4. Step 4: Simplify right side
    205.70x = 39,867.85
  5. Step 5: Solve for x
    x = 39,867.85/205.70
  6. Step 6: Final answer
    x = 193.82

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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.