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Finding the Fourth Proportional to 422.88, 582.36 and 403.44

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Solution

The fourth proportional to 422.88, 582.36 and 403.44 is: 555.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.88 : 582.36 = 403.44 : x
  2. Step 2: Convert to fraction form
    422.88/582.36 = 403.44/x
  3. Step 3: Cross multiply
    422.88x = 582.36 × 403.44
  4. Step 4: Simplify right side
    422.88x = 234,947.32
  5. Step 5: Solve for x
    x = 234,947.32/422.88
  6. Step 6: Final answer
    x = 555.59

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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.