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Finding the Fourth Proportional to 2,866.26, 3,954.75 and 1,921.71

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Solution

The fourth proportional to 2,866.26, 3,954.75 and 1,921.71 is: 2,651.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,866.26 : 3,954.75 = 1,921.71 : x
  2. Step 2: Convert to fraction form
    2,866.26/3,954.75 = 1,921.71/x
  3. Step 3: Cross multiply
    2,866.26x = 3,954.75 × 1,921.71
  4. Step 4: Simplify right side
    2,866.26x = 7,599,882.62
  5. Step 5: Solve for x
    x = 7,599,882.62/2,866.26
  6. Step 6: Final answer
    x = 2,651.50

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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.