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Finding the Fourth Proportional to 204.96, 282.84 and 111.70

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Solution

The fourth proportional to 204.96, 282.84 and 111.70 is: 154.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.96 : 282.84 = 111.70 : x
  2. Step 2: Convert to fraction form
    204.96/282.84 = 111.70/x
  3. Step 3: Cross multiply
    204.96x = 282.84 × 111.70
  4. Step 4: Simplify right side
    204.96x = 31,594.42
  5. Step 5: Solve for x
    x = 31,594.42/204.96
  6. Step 6: Final answer
    x = 154.15

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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.