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Finding the Fourth Proportional to 1,996.92, 2,755.75 and 1,112.80

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Solution

The fourth proportional to 1,996.92, 2,755.75 and 1,112.80 is: 1,535.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,996.92 : 2,755.75 = 1,112.80 : x
  2. Step 2: Convert to fraction form
    1,996.92/2,755.75 = 1,112.80/x
  3. Step 3: Cross multiply
    1,996.92x = 2,755.75 × 1,112.80
  4. Step 4: Simplify right side
    1,996.92x = 3,066,598.60
  5. Step 5: Solve for x
    x = 3,066,598.60/1,996.92
  6. Step 6: Final answer
    x = 1,535.66

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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.