Home / 878,185.38-1,211,891.06-491,000.72

Finding the Fourth Proportional to 878,185.38, 1,211,891.06 and 491,000.72

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Solution

The fourth proportional to 878,185.38, 1,211,891.06 and 491,000.72 is: 677,578.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,185.38 : 1,211,891.06 = 491,000.72 : x
  2. Step 2: Convert to fraction form
    878,185.38/1,211,891.06 = 491,000.72/x
  3. Step 3: Cross multiply
    878,185.38x = 1,211,891.06 × 491,000.72
  4. Step 4: Simplify right side
    878,185.38x = 595,039,383,021.56
  5. Step 5: Solve for x
    x = 595,039,383,021.56/878,185.38
  6. Step 6: Final answer
    x = 677,578.33

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Double scale
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1.5x scale

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.