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Finding the Fourth Proportional to 255.15, 352.14 and 172.33

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Solution

The fourth proportional to 255.15, 352.14 and 172.33 is: 237.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.15 : 352.14 = 172.33 : x
  2. Step 2: Convert to fraction form
    255.15/352.14 = 172.33/x
  3. Step 3: Cross multiply
    255.15x = 352.14 × 172.33
  4. Step 4: Simplify right side
    255.15x = 60,684.29
  5. Step 5: Solve for x
    x = 60,684.29/255.15
  6. Step 6: Final answer
    x = 237.84

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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.