Home / 2,640.90-3,645.09-1,896.54

Finding the Fourth Proportional to 2,640.90, 3,645.09 and 1,896.54

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Solution

The fourth proportional to 2,640.90, 3,645.09 and 1,896.54 is: 2,617.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.90 : 3,645.09 = 1,896.54 : x
  2. Step 2: Convert to fraction form
    2,640.90/3,645.09 = 1,896.54/x
  3. Step 3: Cross multiply
    2,640.90x = 3,645.09 × 1,896.54
  4. Step 4: Simplify right side
    2,640.90x = 6,913,058.99
  5. Step 5: Solve for x
    x = 6,913,058.99/2,640.90
  6. Step 6: Final answer
    x = 2,617.69

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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.