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Finding the Fourth Proportional to 3,906.50, 5,859.75 and 1,170.50

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Solution

The fourth proportional to 3,906.50, 5,859.75 and 1,170.50 is: 1,755.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.50 : 5,859.75 = 1,170.50 : x
  2. Step 2: Convert to fraction form
    3,906.50/5,859.75 = 1,170.50/x
  3. Step 3: Cross multiply
    3,906.50x = 5,859.75 × 1,170.50
  4. Step 4: Simplify right side
    3,906.50x = 6,858,837.38
  5. Step 5: Solve for x
    x = 6,858,837.38/3,906.50
  6. Step 6: Final answer
    x = 1,755.75

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Double scale
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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.