Home / 2,840.68-4,255.21-1,378.63

Finding the Fourth Proportional to 2,840.68, 4,255.21 and 1,378.63

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Solution

The fourth proportional to 2,840.68, 4,255.21 and 1,378.63 is: 2,065.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.68 : 4,255.21 = 1,378.63 : x
  2. Step 2: Convert to fraction form
    2,840.68/4,255.21 = 1,378.63/x
  3. Step 3: Cross multiply
    2,840.68x = 4,255.21 × 1,378.63
  4. Step 4: Simplify right side
    2,840.68x = 5,866,360.16
  5. Step 5: Solve for x
    x = 5,866,360.16/2,840.68
  6. Step 6: Final answer
    x = 2,065.13

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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.