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Finding the Fourth Proportional to 5,813.86, 8,719.92 and 1,917.76

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Solution

The fourth proportional to 5,813.86, 8,719.92 and 1,917.76 is: 2,876.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,813.86 : 8,719.92 = 1,917.76 : x
  2. Step 2: Convert to fraction form
    5,813.86/8,719.92 = 1,917.76/x
  3. Step 3: Cross multiply
    5,813.86x = 8,719.92 × 1,917.76
  4. Step 4: Simplify right side
    5,813.86x = 16,722,713.78
  5. Step 5: Solve for x
    x = 16,722,713.78/5,813.86
  6. Step 6: Final answer
    x = 2,876.35

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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.