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Finding the Fourth Proportional to 3,440.70, 5,161.06 and 843.64

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Solution

The fourth proportional to 3,440.70, 5,161.06 and 843.64 is: 1,265.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,440.70 : 5,161.06 = 843.64 : x
  2. Step 2: Convert to fraction form
    3,440.70/5,161.06 = 843.64/x
  3. Step 3: Cross multiply
    3,440.70x = 5,161.06 × 843.64
  4. Step 4: Simplify right side
    3,440.70x = 4,354,076.66
  5. Step 5: Solve for x
    x = 4,354,076.66/3,440.70
  6. Step 6: Final answer
    x = 1,265.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.