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Finding the Fourth Proportional to 205.95, 284.19 and 117.43

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Solution

The fourth proportional to 205.95, 284.19 and 117.43 is: 162.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.95 : 284.19 = 117.43 : x
  2. Step 2: Convert to fraction form
    205.95/284.19 = 117.43/x
  3. Step 3: Cross multiply
    205.95x = 284.19 × 117.43
  4. Step 4: Simplify right side
    205.95x = 33,372.43
  5. Step 5: Solve for x
    x = 33,372.43/205.95
  6. Step 6: Final answer
    x = 162.04

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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.