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Finding the Fourth Proportional to 193.29, 289.89 and 90.55

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Solution

The fourth proportional to 193.29, 289.89 and 90.55 is: 135.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.29 : 289.89 = 90.55 : x
  2. Step 2: Convert to fraction form
    193.29/289.89 = 90.55/x
  3. Step 3: Cross multiply
    193.29x = 289.89 × 90.55
  4. Step 4: Simplify right side
    193.29x = 26,249.54
  5. Step 5: Solve for x
    x = 26,249.54/193.29
  6. Step 6: Final answer
    x = 135.80

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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.