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Finding the Fourth Proportional to 185.22, 255.38 and 153.72

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Solution

The fourth proportional to 185.22, 255.38 and 153.72 is: 211.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.22 : 255.38 = 153.72 : x
  2. Step 2: Convert to fraction form
    185.22/255.38 = 153.72/x
  3. Step 3: Cross multiply
    185.22x = 255.38 × 153.72
  4. Step 4: Simplify right side
    185.22x = 39,256.25
  5. Step 5: Solve for x
    x = 39,256.25/185.22
  6. Step 6: Final answer
    x = 211.94

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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.