Home / 2,818.80-3,889.96-1,639.91

Finding the Fourth Proportional to 2,818.80, 3,889.96 and 1,639.91

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Solution

The fourth proportional to 2,818.80, 3,889.96 and 1,639.91 is: 2,263.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.80 : 3,889.96 = 1,639.91 : x
  2. Step 2: Convert to fraction form
    2,818.80/3,889.96 = 1,639.91/x
  3. Step 3: Cross multiply
    2,818.80x = 3,889.96 × 1,639.91
  4. Step 4: Simplify right side
    2,818.80x = 6,379,189.93
  5. Step 5: Solve for x
    x = 6,379,189.93/2,818.80
  6. Step 6: Final answer
    x = 2,263.09

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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.