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Finding the Fourth Proportional to 867.43, 1,195.28 and 618.22

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Solution

The fourth proportional to 867.43, 1,195.28 and 618.22 is: 851.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.43 : 1,195.28 = 618.22 : x
  2. Step 2: Convert to fraction form
    867.43/1,195.28 = 618.22/x
  3. Step 3: Cross multiply
    867.43x = 1,195.28 × 618.22
  4. Step 4: Simplify right side
    867.43x = 738,942.24
  5. Step 5: Solve for x
    x = 738,942.24/867.43
  6. Step 6: Final answer
    x = 851.88

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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.