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Finding the Fourth Proportional to 844.22, 1,161.16 and 678.06

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Solution

The fourth proportional to 844.22, 1,161.16 and 678.06 is: 932.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.22 : 1,161.16 = 678.06 : x
  2. Step 2: Convert to fraction form
    844.22/1,161.16 = 678.06/x
  3. Step 3: Cross multiply
    844.22x = 1,161.16 × 678.06
  4. Step 4: Simplify right side
    844.22x = 787,336.15
  5. Step 5: Solve for x
    x = 787,336.15/844.22
  6. Step 6: Final answer
    x = 932.62

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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.