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Finding the Fourth Proportional to 204.98, 282.86 and 122.10

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Solution

The fourth proportional to 204.98, 282.86 and 122.10 is: 168.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.98 : 282.86 = 122.10 : x
  2. Step 2: Convert to fraction form
    204.98/282.86 = 122.10/x
  3. Step 3: Cross multiply
    204.98x = 282.86 × 122.10
  4. Step 4: Simplify right side
    204.98x = 34,537.21
  5. Step 5: Solve for x
    x = 34,537.21/204.98
  6. Step 6: Final answer
    x = 168.49

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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.