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Finding the Fourth Proportional to 1,919.06, 2,878.60 and 945.86

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Solution

The fourth proportional to 1,919.06, 2,878.60 and 945.86 is: 1,418.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.06 : 2,878.60 = 945.86 : x
  2. Step 2: Convert to fraction form
    1,919.06/2,878.60 = 945.86/x
  3. Step 3: Cross multiply
    1,919.06x = 2,878.60 × 945.86
  4. Step 4: Simplify right side
    1,919.06x = 2,722,752.60
  5. Step 5: Solve for x
    x = 2,722,752.60/1,919.06
  6. Step 6: Final answer
    x = 1,418.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.