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Finding the Fourth Proportional to 255.08, 351.81 and 172.14

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Solution

The fourth proportional to 255.08, 351.81 and 172.14 is: 237.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.08 : 351.81 = 172.14 : x
  2. Step 2: Convert to fraction form
    255.08/351.81 = 172.14/x
  3. Step 3: Cross multiply
    255.08x = 351.81 × 172.14
  4. Step 4: Simplify right side
    255.08x = 60,560.57
  5. Step 5: Solve for x
    x = 60,560.57/255.08
  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.