Home / 2,840.65-3,920.34-1,581.94

Finding the Fourth Proportional to 2,840.65, 3,920.34 and 1,581.94

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Solution

The fourth proportional to 2,840.65, 3,920.34 and 1,581.94 is: 2,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.65 : 3,920.34 = 1,581.94 : x
  2. Step 2: Convert to fraction form
    2,840.65/3,920.34 = 1,581.94/x
  3. Step 3: Cross multiply
    2,840.65x = 3,920.34 × 1,581.94
  4. Step 4: Simplify right side
    2,840.65x = 6,201,742.66
  5. Step 5: Solve for x
    x = 6,201,742.66/2,840.65
  6. Step 6: Final answer
    x = 2,183.21

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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.