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Finding the Fourth Proportional to 172.87, 236.69 and 172.26

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Solution

The fourth proportional to 172.87, 236.69 and 172.26 is: 235.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.87 : 236.69 = 172.26 : x
  2. Step 2: Convert to fraction form
    172.87/236.69 = 172.26/x
  3. Step 3: Cross multiply
    172.87x = 236.69 × 172.26
  4. Step 4: Simplify right side
    172.87x = 40,772.00
  5. Step 5: Solve for x
    x = 40,772.00/172.87
  6. Step 6: Final answer
    x = 235.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.