Home / 1,990.15-2,747.64-1,282.34

Finding the Fourth Proportional to 1,990.15, 2,747.64 and 1,282.34

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Solution

The fourth proportional to 1,990.15, 2,747.64 and 1,282.34 is: 1,770.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.15 : 2,747.64 = 1,282.34 : x
  2. Step 2: Convert to fraction form
    1,990.15/2,747.64 = 1,282.34/x
  3. Step 3: Cross multiply
    1,990.15x = 2,747.64 × 1,282.34
  4. Step 4: Simplify right side
    1,990.15x = 3,523,408.68
  5. Step 5: Solve for x
    x = 3,523,408.68/1,990.15
  6. Step 6: Final answer
    x = 1,770.43

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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.