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Finding the Fourth Proportional to 213.70, 320.34 and 136.44

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Solution

The fourth proportional to 213.70, 320.34 and 136.44 is: 204.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.70 : 320.34 = 136.44 : x
  2. Step 2: Convert to fraction form
    213.70/320.34 = 136.44/x
  3. Step 3: Cross multiply
    213.70x = 320.34 × 136.44
  4. Step 4: Simplify right side
    213.70x = 43,706.51
  5. Step 5: Solve for x
    x = 43,706.51/213.70
  6. Step 6: Final answer
    x = 204.53

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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.