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Finding the Fourth Proportional to 3,874.78, 5,347.26 and 2,106.42

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Solution

The fourth proportional to 3,874.78, 5,347.26 and 2,106.42 is: 2,906.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,874.78 : 5,347.26 = 2,106.42 : x
  2. Step 2: Convert to fraction form
    3,874.78/5,347.26 = 2,106.42/x
  3. Step 3: Cross multiply
    3,874.78x = 5,347.26 × 2,106.42
  4. Step 4: Simplify right side
    3,874.78x = 11,263,575.41
  5. Step 5: Solve for x
    x = 11,263,575.41/3,874.78
  6. Step 6: Final answer
    x = 2,906.89

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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.