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Finding the Fourth Proportional to 185.54, 255.90 and 152.72

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Solution

The fourth proportional to 185.54, 255.90 and 152.72 is: 210.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.54 : 255.90 = 152.72 : x
  2. Step 2: Convert to fraction form
    185.54/255.90 = 152.72/x
  3. Step 3: Cross multiply
    185.54x = 255.90 × 152.72
  4. Step 4: Simplify right side
    185.54x = 39,081.05
  5. Step 5: Solve for x
    x = 39,081.05/185.54
  6. Step 6: Final answer
    x = 210.63

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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.