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Finding the Fourth Proportional to 863.28, 1,294.92 and 734.76

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Solution

The fourth proportional to 863.28, 1,294.92 and 734.76 is: 1,102.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.28 : 1,294.92 = 734.76 : x
  2. Step 2: Convert to fraction form
    863.28/1,294.92 = 734.76/x
  3. Step 3: Cross multiply
    863.28x = 1,294.92 × 734.76
  4. Step 4: Simplify right side
    863.28x = 951,455.42
  5. Step 5: Solve for x
    x = 951,455.42/863.28
  6. Step 6: Final answer
    x = 1,102.14

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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.