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Finding the Fourth Proportional to 863.28, 1,294.01 and 376.20

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Solution

The fourth proportional to 863.28, 1,294.01 and 376.20 is: 563.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.28 : 1,294.01 = 376.20 : x
  2. Step 2: Convert to fraction form
    863.28/1,294.01 = 376.20/x
  3. Step 3: Cross multiply
    863.28x = 1,294.01 × 376.20
  4. Step 4: Simplify right side
    863.28x = 486,806.56
  5. Step 5: Solve for x
    x = 486,806.56/863.28
  6. Step 6: Final answer
    x = 563.90

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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.