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Finding the Fourth Proportional to 3,161, 4,362.38 and 1,982.86

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Solution

The fourth proportional to 3,161, 4,362.38 and 1,982.86 is: 2,736.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161 : 4,362.38 = 1,982.86 : x
  2. Step 2: Convert to fraction form
    3,161/4,362.38 = 1,982.86/x
  3. Step 3: Cross multiply
    3,161x = 4,362.38 × 1,982.86
  4. Step 4: Simplify right side
    3,161x = 8,649,988.81
  5. Step 5: Solve for x
    x = 8,649,988.81/3,161
  6. Step 6: Final answer
    x = 2,736.47

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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.