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Finding the Fourth Proportional to 3,038.70, 4,193.94 and 1,919.28

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Solution

The fourth proportional to 3,038.70, 4,193.94 and 1,919.28 is: 2,648.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,038.70 : 4,193.94 = 1,919.28 : x
  2. Step 2: Convert to fraction form
    3,038.70/4,193.94 = 1,919.28/x
  3. Step 3: Cross multiply
    3,038.70x = 4,193.94 × 1,919.28
  4. Step 4: Simplify right side
    3,038.70x = 8,049,345.16
  5. Step 5: Solve for x
    x = 8,049,345.16/3,038.70
  6. Step 6: Final answer
    x = 2,648.94

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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.