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Finding the Fourth Proportional to 306.46, 422.94 and 190

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Solution

The fourth proportional to 306.46, 422.94 and 190 is: 262.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.46 : 422.94 = 190 : x
  2. Step 2: Convert to fraction form
    306.46/422.94 = 190/x
  3. Step 3: Cross multiply
    306.46x = 422.94 × 190
  4. Step 4: Simplify right side
    306.46x = 80,358.60
  5. Step 5: Solve for x
    x = 80,358.60/306.46
  6. Step 6: Final answer
    x = 262.22

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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.