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Finding the Fourth Proportional to 305.98, 422.40 and 195.62

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Solution

The fourth proportional to 305.98, 422.40 and 195.62 is: 270.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.98 : 422.40 = 195.62 : x
  2. Step 2: Convert to fraction form
    305.98/422.40 = 195.62/x
  3. Step 3: Cross multiply
    305.98x = 422.40 × 195.62
  4. Step 4: Simplify right side
    305.98x = 82,629.89
  5. Step 5: Solve for x
    x = 82,629.89/305.98
  6. Step 6: Final answer
    x = 270.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.