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Finding the Fourth Proportional to 422.70, 634.05 and 404.48

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Solution

The fourth proportional to 422.70, 634.05 and 404.48 is: 606.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.70 : 634.05 = 404.48 : x
  2. Step 2: Convert to fraction form
    422.70/634.05 = 404.48/x
  3. Step 3: Cross multiply
    422.70x = 634.05 × 404.48
  4. Step 4: Simplify right side
    422.70x = 256,457.37
  5. Step 5: Solve for x
    x = 256,457.37/422.70
  6. Step 6: Final answer
    x = 606.71

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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.