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Finding the Fourth Proportional to 3,100.68, 4,278.17 and 1,841.21

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Solution

The fourth proportional to 3,100.68, 4,278.17 and 1,841.21 is: 2,540.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.68 : 4,278.17 = 1,841.21 : x
  2. Step 2: Convert to fraction form
    3,100.68/4,278.17 = 1,841.21/x
  3. Step 3: Cross multiply
    3,100.68x = 4,278.17 × 1,841.21
  4. Step 4: Simplify right side
    3,100.68x = 7,876,986.25
  5. Step 5: Solve for x
    x = 7,876,986.25/3,100.68
  6. Step 6: Final answer
    x = 2,540.41

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Half scale
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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.