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Finding the Fourth Proportional to 422.74, 583.44 and 273.31

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Solution

The fourth proportional to 422.74, 583.44 and 273.31 is: 377.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.74 : 583.44 = 273.31 : x
  2. Step 2: Convert to fraction form
    422.74/583.44 = 273.31/x
  3. Step 3: Cross multiply
    422.74x = 583.44 × 273.31
  4. Step 4: Simplify right side
    422.74x = 159,459.99
  5. Step 5: Solve for x
    x = 159,459.99/422.74
  6. Step 6: Final answer
    x = 377.21

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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.