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Finding the Fourth Proportional to 371.46, 512.56 and 205.66

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Solution

The fourth proportional to 371.46, 512.56 and 205.66 is: 283.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.46 : 512.56 = 205.66 : x
  2. Step 2: Convert to fraction form
    371.46/512.56 = 205.66/x
  3. Step 3: Cross multiply
    371.46x = 512.56 × 205.66
  4. Step 4: Simplify right side
    371.46x = 105,413.09
  5. Step 5: Solve for x
    x = 105,413.09/371.46
  6. Step 6: Final answer
    x = 283.78

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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.