Home / 2,818.59-3,890.19-1,639.83

Finding the Fourth Proportional to 2,818.59, 3,890.19 and 1,639.83

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Solution

The fourth proportional to 2,818.59, 3,890.19 and 1,639.83 is: 2,263.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.59 : 3,890.19 = 1,639.83 : x
  2. Step 2: Convert to fraction form
    2,818.59/3,890.19 = 1,639.83/x
  3. Step 3: Cross multiply
    2,818.59x = 3,890.19 × 1,639.83
  4. Step 4: Simplify right side
    2,818.59x = 6,379,250.27
  5. Step 5: Solve for x
    x = 6,379,250.27/2,818.59
  6. Step 6: Final answer
    x = 2,263.28

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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.