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Finding the Fourth Proportional to 571.79, 789.11 and 323.12

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Solution

The fourth proportional to 571.79, 789.11 and 323.12 is: 445.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.79 : 789.11 = 323.12 : x
  2. Step 2: Convert to fraction form
    571.79/789.11 = 323.12/x
  3. Step 3: Cross multiply
    571.79x = 789.11 × 323.12
  4. Step 4: Simplify right side
    571.79x = 254,978.79
  5. Step 5: Solve for x
    x = 254,978.79/571.79
  6. Step 6: Final answer
    x = 445.93

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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.