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Finding the Fourth Proportional to 1,999.12, 2,759 and 1,202.71

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Solution

The fourth proportional to 1,999.12, 2,759 and 1,202.71 is: 1,659.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.12 : 2,759 = 1,202.71 : x
  2. Step 2: Convert to fraction form
    1,999.12/2,759 = 1,202.71/x
  3. Step 3: Cross multiply
    1,999.12x = 2,759 × 1,202.71
  4. Step 4: Simplify right side
    1,999.12x = 3,318,276.89
  5. Step 5: Solve for x
    x = 3,318,276.89/1,999.12
  6. Step 6: Final answer
    x = 1,659.87

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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.