Home / 2,840.32-3,919.36-1,581.28

Finding the Fourth Proportional to 2,840.32, 3,919.36 and 1,581.28

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Solution

The fourth proportional to 2,840.32, 3,919.36 and 1,581.28 is: 2,182.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.32 : 3,919.36 = 1,581.28 : x
  2. Step 2: Convert to fraction form
    2,840.32/3,919.36 = 1,581.28/x
  3. Step 3: Cross multiply
    2,840.32x = 3,919.36 × 1,581.28
  4. Step 4: Simplify right side
    2,840.32x = 6,197,605.58
  5. Step 5: Solve for x
    x = 6,197,605.58/2,840.32
  6. Step 6: Final answer
    x = 2,182.01

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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.