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Finding the Fourth Proportional to 204.78, 307.22 and 83.01

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Solution

The fourth proportional to 204.78, 307.22 and 83.01 is: 124.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.78 : 307.22 = 83.01 : x
  2. Step 2: Convert to fraction form
    204.78/307.22 = 83.01/x
  3. Step 3: Cross multiply
    204.78x = 307.22 × 83.01
  4. Step 4: Simplify right side
    204.78x = 25,502.33
  5. Step 5: Solve for x
    x = 25,502.33/204.78
  6. Step 6: Final answer
    x = 124.54

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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.