Home / 2,840.81-3,918.38-1,896.21

Finding the Fourth Proportional to 2,840.81, 3,918.38 and 1,896.21

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Solution

The fourth proportional to 2,840.81, 3,918.38 and 1,896.21 is: 2,615.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.81 : 3,918.38 = 1,896.21 : x
  2. Step 2: Convert to fraction form
    2,840.81/3,918.38 = 1,896.21/x
  3. Step 3: Cross multiply
    2,840.81x = 3,918.38 × 1,896.21
  4. Step 4: Simplify right side
    2,840.81x = 7,430,061.86
  5. Step 5: Solve for x
    x = 7,430,061.86/2,840.81
  6. Step 6: Final answer
    x = 2,615.48

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Double scale
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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.