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Finding the Fourth Proportional to 195.22, 292.90 and 126.90

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Solution

The fourth proportional to 195.22, 292.90 and 126.90 is: 190.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.22 : 292.90 = 126.90 : x
  2. Step 2: Convert to fraction form
    195.22/292.90 = 126.90/x
  3. Step 3: Cross multiply
    195.22x = 292.90 × 126.90
  4. Step 4: Simplify right side
    195.22x = 37,169.01
  5. Step 5: Solve for x
    x = 37,169.01/195.22
  6. Step 6: Final answer
    x = 190.40

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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.