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Finding the Fourth Proportional to 155.27, 213.05 and 153.82

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Solution

The fourth proportional to 155.27, 213.05 and 153.82 is: 211.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.27 : 213.05 = 153.82 : x
  2. Step 2: Convert to fraction form
    155.27/213.05 = 153.82/x
  3. Step 3: Cross multiply
    155.27x = 213.05 × 153.82
  4. Step 4: Simplify right side
    155.27x = 32,771.35
  5. Step 5: Solve for x
    x = 32,771.35/155.27
  6. Step 6: Final answer
    x = 211.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.