Home / 2,261.87-3,120.46-1,378.18

Finding the Fourth Proportional to 2,261.87, 3,120.46 and 1,378.18

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Solution

The fourth proportional to 2,261.87, 3,120.46 and 1,378.18 is: 1,901.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.87 : 3,120.46 = 1,378.18 : x
  2. Step 2: Convert to fraction form
    2,261.87/3,120.46 = 1,378.18/x
  3. Step 3: Cross multiply
    2,261.87x = 3,120.46 × 1,378.18
  4. Step 4: Simplify right side
    2,261.87x = 4,300,555.56
  5. Step 5: Solve for x
    x = 4,300,555.56/2,261.87
  6. Step 6: Final answer
    x = 1,901.33

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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.