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Finding the Fourth Proportional to 422.69, 583.38 and 322.94

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Solution

The fourth proportional to 422.69, 583.38 and 322.94 is: 445.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.69 : 583.38 = 322.94 : x
  2. Step 2: Convert to fraction form
    422.69/583.38 = 322.94/x
  3. Step 3: Cross multiply
    422.69x = 583.38 × 322.94
  4. Step 4: Simplify right side
    422.69x = 188,396.74
  5. Step 5: Solve for x
    x = 188,396.74/422.69
  6. Step 6: Final answer
    x = 445.71

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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.