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Finding the Fourth Proportional to 554.44, 765.23 and 321.56

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Solution

The fourth proportional to 554.44, 765.23 and 321.56 is: 443.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.44 : 765.23 = 321.56 : x
  2. Step 2: Convert to fraction form
    554.44/765.23 = 321.56/x
  3. Step 3: Cross multiply
    554.44x = 765.23 × 321.56
  4. Step 4: Simplify right side
    554.44x = 246,067.66
  5. Step 5: Solve for x
    x = 246,067.66/554.44
  6. Step 6: Final answer
    x = 443.81

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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.