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Finding the Fourth Proportional to 205.12, 282.72 and 163.60

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Solution

The fourth proportional to 205.12, 282.72 and 163.60 is: 225.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.12 : 282.72 = 163.60 : x
  2. Step 2: Convert to fraction form
    205.12/282.72 = 163.60/x
  3. Step 3: Cross multiply
    205.12x = 282.72 × 163.60
  4. Step 4: Simplify right side
    205.12x = 46,252.99
  5. Step 5: Solve for x
    x = 46,252.99/205.12
  6. Step 6: Final answer
    x = 225.49

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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.