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Finding the Fourth Proportional to 193.92, 290.70 and 84.32

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Solution

The fourth proportional to 193.92, 290.70 and 84.32 is: 126.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.92 : 290.70 = 84.32 : x
  2. Step 2: Convert to fraction form
    193.92/290.70 = 84.32/x
  3. Step 3: Cross multiply
    193.92x = 290.70 × 84.32
  4. Step 4: Simplify right side
    193.92x = 24,511.82
  5. Step 5: Solve for x
    x = 24,511.82/193.92
  6. Step 6: Final answer
    x = 126.40

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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.