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Finding the Fourth Proportional to 204.77, 307.21 and 67.83

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Solution

The fourth proportional to 204.77, 307.21 and 67.83 is: 101.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.77 : 307.21 = 67.83 : x
  2. Step 2: Convert to fraction form
    204.77/307.21 = 67.83/x
  3. Step 3: Cross multiply
    204.77x = 307.21 × 67.83
  4. Step 4: Simplify right side
    204.77x = 20,838.09
  5. Step 5: Solve for x
    x = 20,838.09/204.77
  6. Step 6: Final answer
    x = 101.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.