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Finding the Fourth Proportional to 213.38, 294.27 and 139.67

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Solution

The fourth proportional to 213.38, 294.27 and 139.67 is: 192.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.38 : 294.27 = 139.67 : x
  2. Step 2: Convert to fraction form
    213.38/294.27 = 139.67/x
  3. Step 3: Cross multiply
    213.38x = 294.27 × 139.67
  4. Step 4: Simplify right side
    213.38x = 41,100.69
  5. Step 5: Solve for x
    x = 41,100.69/213.38
  6. Step 6: Final answer
    x = 192.62

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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.