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Finding the Fourth Proportional to 193.93, 290.78 and 84.19

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Solution

The fourth proportional to 193.93, 290.78 and 84.19 is: 126.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.93 : 290.78 = 84.19 : x
  2. Step 2: Convert to fraction form
    193.93/290.78 = 84.19/x
  3. Step 3: Cross multiply
    193.93x = 290.78 × 84.19
  4. Step 4: Simplify right side
    193.93x = 24,480.77
  5. Step 5: Solve for x
    x = 24,480.77/193.93
  6. Step 6: Final answer
    x = 126.24

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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.