Home / 2,818.25-3,889.66-1,640

Finding the Fourth Proportional to 2,818.25, 3,889.66 and 1,640

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Solution

The fourth proportional to 2,818.25, 3,889.66 and 1,640 is: 2,263.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.25 : 3,889.66 = 1,640 : x
  2. Step 2: Convert to fraction form
    2,818.25/3,889.66 = 1,640/x
  3. Step 3: Cross multiply
    2,818.25x = 3,889.66 × 1,640
  4. Step 4: Simplify right side
    2,818.25x = 6,379,042.40
  5. Step 5: Solve for x
    x = 6,379,042.40/2,818.25
  6. Step 6: Final answer
    x = 2,263.48

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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.