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Finding the Fourth Proportional to 193.89, 290.83 and 129.31

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Solution

The fourth proportional to 193.89, 290.83 and 129.31 is: 193.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.89 : 290.83 = 129.31 : x
  2. Step 2: Convert to fraction form
    193.89/290.83 = 129.31/x
  3. Step 3: Cross multiply
    193.89x = 290.83 × 129.31
  4. Step 4: Simplify right side
    193.89x = 37,605.77
  5. Step 5: Solve for x
    x = 37,605.77/193.89
  6. Step 6: Final answer
    x = 193.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.