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Finding the Fourth Proportional to 571.25, 855.51 and 327.05

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Solution

The fourth proportional to 571.25, 855.51 and 327.05 is: 489.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.25 : 855.51 = 327.05 : x
  2. Step 2: Convert to fraction form
    571.25/855.51 = 327.05/x
  3. Step 3: Cross multiply
    571.25x = 855.51 × 327.05
  4. Step 4: Simplify right side
    571.25x = 279,794.55
  5. Step 5: Solve for x
    x = 279,794.55/571.25
  6. Step 6: Final answer
    x = 489.79

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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.