Home / 2,105.70-2,905.79-1,161.46

Finding the Fourth Proportional to 2,105.70, 2,905.79 and 1,161.46

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Solution

The fourth proportional to 2,105.70, 2,905.79 and 1,161.46 is: 1,602.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.70 : 2,905.79 = 1,161.46 : x
  2. Step 2: Convert to fraction form
    2,105.70/2,905.79 = 1,161.46/x
  3. Step 3: Cross multiply
    2,105.70x = 2,905.79 × 1,161.46
  4. Step 4: Simplify right side
    2,105.70x = 3,374,958.85
  5. Step 5: Solve for x
    x = 3,374,958.85/2,105.70
  6. Step 6: Final answer
    x = 1,602.77

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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.