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Finding the Fourth Proportional to 571.85, 789.30 and 323.31

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Solution

The fourth proportional to 571.85, 789.30 and 323.31 is: 446.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.85 : 789.30 = 323.31 : x
  2. Step 2: Convert to fraction form
    571.85/789.30 = 323.31/x
  3. Step 3: Cross multiply
    571.85x = 789.30 × 323.31
  4. Step 4: Simplify right side
    571.85x = 255,188.58
  5. Step 5: Solve for x
    x = 255,188.58/571.85
  6. Step 6: Final answer
    x = 446.25

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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.