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Finding the Fourth Proportional to 204.99, 282.89 and 111.74

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Solution

The fourth proportional to 204.99, 282.89 and 111.74 is: 154.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.99 : 282.89 = 111.74 : x
  2. Step 2: Convert to fraction form
    204.99/282.89 = 111.74/x
  3. Step 3: Cross multiply
    204.99x = 282.89 × 111.74
  4. Step 4: Simplify right side
    204.99x = 31,608.99
  5. Step 5: Solve for x
    x = 31,608.99/204.99
  6. Step 6: Final answer
    x = 154.20

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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.