Home / 2,840.45-3,919.85-1,581.57

Finding the Fourth Proportional to 2,840.45, 3,919.85 and 1,581.57

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Solution

The fourth proportional to 2,840.45, 3,919.85 and 1,581.57 is: 2,182.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.45 : 3,919.85 = 1,581.57 : x
  2. Step 2: Convert to fraction form
    2,840.45/3,919.85 = 1,581.57/x
  3. Step 3: Cross multiply
    2,840.45x = 3,919.85 × 1,581.57
  4. Step 4: Simplify right side
    2,840.45x = 6,199,509.26
  5. Step 5: Solve for x
    x = 6,199,509.26/2,840.45
  6. Step 6: Final answer
    x = 2,182.58

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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.