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Finding the Fourth Proportional to 204.98, 282.77 and 142.91

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Solution

The fourth proportional to 204.98, 282.77 and 142.91 is: 197.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.98 : 282.77 = 142.91 : x
  2. Step 2: Convert to fraction form
    204.98/282.77 = 142.91/x
  3. Step 3: Cross multiply
    204.98x = 282.77 × 142.91
  4. Step 4: Simplify right side
    204.98x = 40,408.53
  5. Step 5: Solve for x
    x = 40,408.53/204.98
  6. Step 6: Final answer
    x = 197.14

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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.