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Finding the Fourth Proportional to 206.43, 309.56 and 113.94

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Solution

The fourth proportional to 206.43, 309.56 and 113.94 is: 170.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.43 : 309.56 = 113.94 : x
  2. Step 2: Convert to fraction form
    206.43/309.56 = 113.94/x
  3. Step 3: Cross multiply
    206.43x = 309.56 × 113.94
  4. Step 4: Simplify right side
    206.43x = 35,271.27
  5. Step 5: Solve for x
    x = 35,271.27/206.43
  6. Step 6: Final answer
    x = 170.86

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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.