Home / 2,126.36-3,190.26-1,305.20

Finding the Fourth Proportional to 2,126.36, 3,190.26 and 1,305.20

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Solution

The fourth proportional to 2,126.36, 3,190.26 and 1,305.20 is: 1,958.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.36 : 3,190.26 = 1,305.20 : x
  2. Step 2: Convert to fraction form
    2,126.36/3,190.26 = 1,305.20/x
  3. Step 3: Cross multiply
    2,126.36x = 3,190.26 × 1,305.20
  4. Step 4: Simplify right side
    2,126.36x = 4,163,927.35
  5. Step 5: Solve for x
    x = 4,163,927.35/2,126.36
  6. Step 6: Final answer
    x = 1,958.24

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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.