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Finding the Fourth Proportional to 204.70, 306.40 and 113.18

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Solution

The fourth proportional to 204.70, 306.40 and 113.18 is: 169.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.70 : 306.40 = 113.18 : x
  2. Step 2: Convert to fraction form
    204.70/306.40 = 113.18/x
  3. Step 3: Cross multiply
    204.70x = 306.40 × 113.18
  4. Step 4: Simplify right side
    204.70x = 34,678.35
  5. Step 5: Solve for x
    x = 34,678.35/204.70
  6. Step 6: Final answer
    x = 169.41

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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.