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Finding the Fourth Proportional to 3,440.94, 5,161.38 and 843.85

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Solution

The fourth proportional to 3,440.94, 5,161.38 and 843.85 is: 1,265.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,440.94 : 5,161.38 = 843.85 : x
  2. Step 2: Convert to fraction form
    3,440.94/5,161.38 = 843.85/x
  3. Step 3: Cross multiply
    3,440.94x = 5,161.38 × 843.85
  4. Step 4: Simplify right side
    3,440.94x = 4,355,430.51
  5. Step 5: Solve for x
    x = 4,355,430.51/3,440.94
  6. Step 6: Final answer
    x = 1,265.77

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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.