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Finding the Fourth Proportional to 205.72, 308.04 and 113.98

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Solution

The fourth proportional to 205.72, 308.04 and 113.98 is: 170.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.72 : 308.04 = 113.98 : x
  2. Step 2: Convert to fraction form
    205.72/308.04 = 113.98/x
  3. Step 3: Cross multiply
    205.72x = 308.04 × 113.98
  4. Step 4: Simplify right side
    205.72x = 35,110.40
  5. Step 5: Solve for x
    x = 35,110.40/205.72
  6. Step 6: Final answer
    x = 170.67

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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.