Home / 2,105.68-2,905.70-1,161.42

Finding the Fourth Proportional to 2,105.68, 2,905.70 and 1,161.42

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Solution

The fourth proportional to 2,105.68, 2,905.70 and 1,161.42 is: 1,602.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.68 : 2,905.70 = 1,161.42 : x
  2. Step 2: Convert to fraction form
    2,105.68/2,905.70 = 1,161.42/x
  3. Step 3: Cross multiply
    2,105.68x = 2,905.70 × 1,161.42
  4. Step 4: Simplify right side
    2,105.68x = 3,374,738.09
  5. Step 5: Solve for x
    x = 3,374,738.09/2,105.68
  6. Step 6: Final answer
    x = 1,602.68

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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.