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Finding the Fourth Proportional to 205.15, 282.79 and 163.64

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Solution

The fourth proportional to 205.15, 282.79 and 163.64 is: 225.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.15 : 282.79 = 163.64 : x
  2. Step 2: Convert to fraction form
    205.15/282.79 = 163.64/x
  3. Step 3: Cross multiply
    205.15x = 282.79 × 163.64
  4. Step 4: Simplify right side
    205.15x = 46,275.08
  5. Step 5: Solve for x
    x = 46,275.08/205.15
  6. Step 6: Final answer
    x = 225.57

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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.