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Finding the Fourth Proportional to 571.32, 855.90 and 327.78

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Solution

The fourth proportional to 571.32, 855.90 and 327.78 is: 491.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.32 : 855.90 = 327.78 : x
  2. Step 2: Convert to fraction form
    571.32/855.90 = 327.78/x
  3. Step 3: Cross multiply
    571.32x = 855.90 × 327.78
  4. Step 4: Simplify right side
    571.32x = 280,546.90
  5. Step 5: Solve for x
    x = 280,546.90/571.32
  6. Step 6: Final answer
    x = 491.05

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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.