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Finding the Fourth Proportional to 855.33, 1,175.22 and 680.37

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Solution

The fourth proportional to 855.33, 1,175.22 and 680.37 is: 934.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.33 : 1,175.22 = 680.37 : x
  2. Step 2: Convert to fraction form
    855.33/1,175.22 = 680.37/x
  3. Step 3: Cross multiply
    855.33x = 1,175.22 × 680.37
  4. Step 4: Simplify right side
    855.33x = 799,584.43
  5. Step 5: Solve for x
    x = 799,584.43/855.33
  6. Step 6: Final answer
    x = 934.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.