Home / 2,840.35-4,259.58-1,378.57

Finding the Fourth Proportional to 2,840.35, 4,259.58 and 1,378.57

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Solution

The fourth proportional to 2,840.35, 4,259.58 and 1,378.57 is: 2,067.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.35 : 4,259.58 = 1,378.57 : x
  2. Step 2: Convert to fraction form
    2,840.35/4,259.58 = 1,378.57/x
  3. Step 3: Cross multiply
    2,840.35x = 4,259.58 × 1,378.57
  4. Step 4: Simplify right side
    2,840.35x = 5,872,129.20
  5. Step 5: Solve for x
    x = 5,872,129.20/2,840.35
  6. Step 6: Final answer
    x = 2,067.40

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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.