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Finding the Fourth Proportional to 2,838.76, 3,911.26 and 1,905.64

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Solution

The fourth proportional to 2,838.76, 3,911.26 and 1,905.64 is: 2,625.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,838.76 : 3,911.26 = 1,905.64 : x
  2. Step 2: Convert to fraction form
    2,838.76/3,911.26 = 1,905.64/x
  3. Step 3: Cross multiply
    2,838.76x = 3,911.26 × 1,905.64
  4. Step 4: Simplify right side
    2,838.76x = 7,453,453.51
  5. Step 5: Solve for x
    x = 7,453,453.51/2,838.76
  6. Step 6: Final answer
    x = 2,625.60

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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.