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Finding the Fourth Proportional to 863.29, 1,191.60 and 552.79

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Solution

The fourth proportional to 863.29, 1,191.60 and 552.79 is: 763.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.29 : 1,191.60 = 552.79 : x
  2. Step 2: Convert to fraction form
    863.29/1,191.60 = 552.79/x
  3. Step 3: Cross multiply
    863.29x = 1,191.60 × 552.79
  4. Step 4: Simplify right side
    863.29x = 658,704.56
  5. Step 5: Solve for x
    x = 658,704.56/863.29
  6. Step 6: Final answer
    x = 763.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.