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Finding the Fourth Proportional to 863.07, 1,189.32 and 613.95

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Solution

The fourth proportional to 863.07, 1,189.32 and 613.95 is: 846.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.07 : 1,189.32 = 613.95 : x
  2. Step 2: Convert to fraction form
    863.07/1,189.32 = 613.95/x
  3. Step 3: Cross multiply
    863.07x = 1,189.32 × 613.95
  4. Step 4: Simplify right side
    863.07x = 730,183.01
  5. Step 5: Solve for x
    x = 730,183.01/863.07
  6. Step 6: Final answer
    x = 846.03

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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.