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Finding the Fourth Proportional to 205.50, 283.62 and 127.86

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Solution

The fourth proportional to 205.50, 283.62 and 127.86 is: 176.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.50 : 283.62 = 127.86 : x
  2. Step 2: Convert to fraction form
    205.50/283.62 = 127.86/x
  3. Step 3: Cross multiply
    205.50x = 283.62 × 127.86
  4. Step 4: Simplify right side
    205.50x = 36,263.65
  5. Step 5: Solve for x
    x = 36,263.65/205.50
  6. Step 6: Final answer
    x = 176.47

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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.