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Finding the Fourth Proportional to 251.44, 347.06 and 172.87

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Solution

The fourth proportional to 251.44, 347.06 and 172.87 is: 238.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.44 : 347.06 = 172.87 : x
  2. Step 2: Convert to fraction form
    251.44/347.06 = 172.87/x
  3. Step 3: Cross multiply
    251.44x = 347.06 × 172.87
  4. Step 4: Simplify right side
    251.44x = 59,993.66
  5. Step 5: Solve for x
    x = 59,993.66/251.44
  6. Step 6: Final answer
    x = 238.61

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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.