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Finding the Fourth Proportional to 571.80, 856.61 and 327.58

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Solution

The fourth proportional to 571.80, 856.61 and 327.58 is: 490.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.80 : 856.61 = 327.58 : x
  2. Step 2: Convert to fraction form
    571.80/856.61 = 327.58/x
  3. Step 3: Cross multiply
    571.80x = 856.61 × 327.58
  4. Step 4: Simplify right side
    571.80x = 280,608.30
  5. Step 5: Solve for x
    x = 280,608.30/571.80
  6. Step 6: Final answer
    x = 490.75

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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.