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Finding the Fourth Proportional to 205.15, 283.06 and 149.22

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Solution

The fourth proportional to 205.15, 283.06 and 149.22 is: 205.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.15 : 283.06 = 149.22 : x
  2. Step 2: Convert to fraction form
    205.15/283.06 = 149.22/x
  3. Step 3: Cross multiply
    205.15x = 283.06 × 149.22
  4. Step 4: Simplify right side
    205.15x = 42,236.97
  5. Step 5: Solve for x
    x = 42,236.97/205.15
  6. Step 6: Final answer
    x = 205.89

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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.