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Finding the Fourth Proportional to 255.18, 351.71 and 172.26

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Solution

The fourth proportional to 255.18, 351.71 and 172.26 is: 237.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.18 : 351.71 = 172.26 : x
  2. Step 2: Convert to fraction form
    255.18/351.71 = 172.26/x
  3. Step 3: Cross multiply
    255.18x = 351.71 × 172.26
  4. Step 4: Simplify right side
    255.18x = 60,584.70
  5. Step 5: Solve for x
    x = 60,584.70/255.18
  6. Step 6: Final answer
    x = 237.42

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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.