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Finding the Fourth Proportional to 205.25, 283.23 and 117.90

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Solution

The fourth proportional to 205.25, 283.23 and 117.90 is: 162.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.25 : 283.23 = 117.90 : x
  2. Step 2: Convert to fraction form
    205.25/283.23 = 117.90/x
  3. Step 3: Cross multiply
    205.25x = 283.23 × 117.90
  4. Step 4: Simplify right side
    205.25x = 33,392.82
  5. Step 5: Solve for x
    x = 33,392.82/205.25
  6. Step 6: Final answer
    x = 162.70

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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.