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Finding the Fourth Proportional to 185.23, 255.48 and 115.21

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Solution

The fourth proportional to 185.23, 255.48 and 115.21 is: 158.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.23 : 255.48 = 115.21 : x
  2. Step 2: Convert to fraction form
    185.23/255.48 = 115.21/x
  3. Step 3: Cross multiply
    185.23x = 255.48 × 115.21
  4. Step 4: Simplify right side
    185.23x = 29,432.00
  5. Step 5: Solve for x
    x = 29,432.00/185.23
  6. Step 6: Final answer
    x = 158.90

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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.