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Finding the Fourth Proportional to 234.12, 323.28 and 172.02

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Solution

The fourth proportional to 234.12, 323.28 and 172.02 is: 237.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.12 : 323.28 = 172.02 : x
  2. Step 2: Convert to fraction form
    234.12/323.28 = 172.02/x
  3. Step 3: Cross multiply
    234.12x = 323.28 × 172.02
  4. Step 4: Simplify right side
    234.12x = 55,610.63
  5. Step 5: Solve for x
    x = 55,610.63/234.12
  6. Step 6: Final answer
    x = 237.53

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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.