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Finding the Fourth Proportional to 193.92, 289.31 and 172.59

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Solution

The fourth proportional to 193.92, 289.31 and 172.59 is: 257.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.92 : 289.31 = 172.59 : x
  2. Step 2: Convert to fraction form
    193.92/289.31 = 172.59/x
  3. Step 3: Cross multiply
    193.92x = 289.31 × 172.59
  4. Step 4: Simplify right side
    193.92x = 49,932.01
  5. Step 5: Solve for x
    x = 49,932.01/193.92
  6. Step 6: Final answer
    x = 257.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.