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Finding the Fourth Proportional to 205.39, 282.81 and 172.57

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Solution

The fourth proportional to 205.39, 282.81 and 172.57 is: 237.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.39 : 282.81 = 172.57 : x
  2. Step 2: Convert to fraction form
    205.39/282.81 = 172.57/x
  3. Step 3: Cross multiply
    205.39x = 282.81 × 172.57
  4. Step 4: Simplify right side
    205.39x = 48,804.52
  5. Step 5: Solve for x
    x = 48,804.52/205.39
  6. Step 6: Final answer
    x = 237.62

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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.