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Finding the Fourth Proportional to 571.28, 856.92 and 379.04

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Solution

The fourth proportional to 571.28, 856.92 and 379.04 is: 568.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.28 : 856.92 = 379.04 : x
  2. Step 2: Convert to fraction form
    571.28/856.92 = 379.04/x
  3. Step 3: Cross multiply
    571.28x = 856.92 × 379.04
  4. Step 4: Simplify right side
    571.28x = 324,806.96
  5. Step 5: Solve for x
    x = 324,806.96/571.28
  6. Step 6: Final answer
    x = 568.56

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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.