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Finding the Fourth Proportional to 1,640.99, 2,249.81 and 1,611.43

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Solution

The fourth proportional to 1,640.99, 2,249.81 and 1,611.43 is: 2,209.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.99 : 2,249.81 = 1,611.43 : x
  2. Step 2: Convert to fraction form
    1,640.99/2,249.81 = 1,611.43/x
  3. Step 3: Cross multiply
    1,640.99x = 2,249.81 × 1,611.43
  4. Step 4: Simplify right side
    1,640.99x = 3,625,403.69
  5. Step 5: Solve for x
    x = 3,625,403.69/1,640.99
  6. Step 6: Final answer
    x = 2,209.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.