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Finding the Fourth Proportional to 863.09, 1,190.48 and 531.62

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Solution

The fourth proportional to 863.09, 1,190.48 and 531.62 is: 733.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.09 : 1,190.48 = 531.62 : x
  2. Step 2: Convert to fraction form
    863.09/1,190.48 = 531.62/x
  3. Step 3: Cross multiply
    863.09x = 1,190.48 × 531.62
  4. Step 4: Simplify right side
    863.09x = 632,882.98
  5. Step 5: Solve for x
    x = 632,882.98/863.09
  6. Step 6: Final answer
    x = 733.28

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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.