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Finding the Fourth Proportional to 1,996.42, 2,754.12 and 1,209.91

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Solution

The fourth proportional to 1,996.42, 2,754.12 and 1,209.91 is: 1,669.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,996.42 : 2,754.12 = 1,209.91 : x
  2. Step 2: Convert to fraction form
    1,996.42/2,754.12 = 1,209.91/x
  3. Step 3: Cross multiply
    1,996.42x = 2,754.12 × 1,209.91
  4. Step 4: Simplify right side
    1,996.42x = 3,332,237.33
  5. Step 5: Solve for x
    x = 3,332,237.33/1,996.42
  6. Step 6: Final answer
    x = 1,669.11

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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.