Home / 2,126.45-3,190.75-1,100.45

Finding the Fourth Proportional to 2,126.45, 3,190.75 and 1,100.45

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Solution

The fourth proportional to 2,126.45, 3,190.75 and 1,100.45 is: 1,651.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.45 : 3,190.75 = 1,100.45 : x
  2. Step 2: Convert to fraction form
    2,126.45/3,190.75 = 1,100.45/x
  3. Step 3: Cross multiply
    2,126.45x = 3,190.75 × 1,100.45
  4. Step 4: Simplify right side
    2,126.45x = 3,511,242.13
  5. Step 5: Solve for x
    x = 3,511,242.13/2,126.45
  6. Step 6: Final answer
    x = 1,651.23

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Half scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.