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Finding the Fourth Proportional to 185.16, 255.60 and 172.20

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Solution

The fourth proportional to 185.16, 255.60 and 172.20 is: 237.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.16 : 255.60 = 172.20 : x
  2. Step 2: Convert to fraction form
    185.16/255.60 = 172.20/x
  3. Step 3: Cross multiply
    185.16x = 255.60 × 172.20
  4. Step 4: Simplify right side
    185.16x = 44,014.32
  5. Step 5: Solve for x
    x = 44,014.32/185.16
  6. Step 6: Final answer
    x = 237.71

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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.