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Finding the Fourth Proportional to 866.26, 1,195.44 and 493.22

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Solution

The fourth proportional to 866.26, 1,195.44 and 493.22 is: 680.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.26 : 1,195.44 = 493.22 : x
  2. Step 2: Convert to fraction form
    866.26/1,195.44 = 493.22/x
  3. Step 3: Cross multiply
    866.26x = 1,195.44 × 493.22
  4. Step 4: Simplify right side
    866.26x = 589,608.94
  5. Step 5: Solve for x
    x = 589,608.94/866.26
  6. Step 6: Final answer
    x = 680.64

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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.