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Finding the Fourth Proportional to 538.79, 806.94 and 321.89

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Solution

The fourth proportional to 538.79, 806.94 and 321.89 is: 482.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.79 : 806.94 = 321.89 : x
  2. Step 2: Convert to fraction form
    538.79/806.94 = 321.89/x
  3. Step 3: Cross multiply
    538.79x = 806.94 × 321.89
  4. Step 4: Simplify right side
    538.79x = 259,745.92
  5. Step 5: Solve for x
    x = 259,745.92/538.79
  6. Step 6: Final answer
    x = 482.09

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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.