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Finding the Fourth Proportional to 255.42, 352.31 and 172.49

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Solution

The fourth proportional to 255.42, 352.31 and 172.49 is: 237.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.42 : 352.31 = 172.49 : x
  2. Step 2: Convert to fraction form
    255.42/352.31 = 172.49/x
  3. Step 3: Cross multiply
    255.42x = 352.31 × 172.49
  4. Step 4: Simplify right side
    255.42x = 60,767.33
  5. Step 5: Solve for x
    x = 60,767.33/255.42
  6. Step 6: Final answer
    x = 237.91

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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.