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Finding the Fourth Proportional to 2,879.70, 3,975.27 and 2,240.19

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Solution

The fourth proportional to 2,879.70, 3,975.27 and 2,240.19 is: 3,092.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.70 : 3,975.27 = 2,240.19 : x
  2. Step 2: Convert to fraction form
    2,879.70/3,975.27 = 2,240.19/x
  3. Step 3: Cross multiply
    2,879.70x = 3,975.27 × 2,240.19
  4. Step 4: Simplify right side
    2,879.70x = 8,905,360.10
  5. Step 5: Solve for x
    x = 8,905,360.10/2,879.70
  6. Step 6: Final answer
    x = 3,092.46

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Double scale
Find fourth proportional to 2,880.70, 3,976.65 and 2,241.19
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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.