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Finding the Fourth Proportional to 205.57, 283.70 and 126.88

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Solution

The fourth proportional to 205.57, 283.70 and 126.88 is: 175.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.57 : 283.70 = 126.88 : x
  2. Step 2: Convert to fraction form
    205.57/283.70 = 126.88/x
  3. Step 3: Cross multiply
    205.57x = 283.70 × 126.88
  4. Step 4: Simplify right side
    205.57x = 35,995.86
  5. Step 5: Solve for x
    x = 35,995.86/205.57
  6. Step 6: Final answer
    x = 175.10

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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.