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Finding the Fourth Proportional to 205.86, 307.22 and 188.58

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Solution

The fourth proportional to 205.86, 307.22 and 188.58 is: 281.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.86 : 307.22 = 188.58 : x
  2. Step 2: Convert to fraction form
    205.86/307.22 = 188.58/x
  3. Step 3: Cross multiply
    205.86x = 307.22 × 188.58
  4. Step 4: Simplify right side
    205.86x = 57,935.55
  5. Step 5: Solve for x
    x = 57,935.55/205.86
  6. Step 6: Final answer
    x = 281.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.