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Finding the Fourth Proportional to 3,161, 4,741.50 and 969.71

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Solution

The fourth proportional to 3,161, 4,741.50 and 969.71 is: 1,454.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161 : 4,741.50 = 969.71 : x
  2. Step 2: Convert to fraction form
    3,161/4,741.50 = 969.71/x
  3. Step 3: Cross multiply
    3,161x = 4,741.50 × 969.71
  4. Step 4: Simplify right side
    3,161x = 4,597,879.97
  5. Step 5: Solve for x
    x = 4,597,879.97/3,161
  6. Step 6: Final answer
    x = 1,454.57

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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.