Home / 2,818.63-3,889.64-1,640.35

Finding the Fourth Proportional to 2,818.63, 3,889.64 and 1,640.35

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Solution

The fourth proportional to 2,818.63, 3,889.64 and 1,640.35 is: 2,263.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.63 : 3,889.64 = 1,640.35 : x
  2. Step 2: Convert to fraction form
    2,818.63/3,889.64 = 1,640.35/x
  3. Step 3: Cross multiply
    2,818.63x = 3,889.64 × 1,640.35
  4. Step 4: Simplify right side
    2,818.63x = 6,380,365.35
  5. Step 5: Solve for x
    x = 6,380,365.35/2,818.63
  6. Step 6: Final answer
    x = 2,263.64

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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.