Home / 1,982.21-2,735.64-1,143.05

Finding the Fourth Proportional to 1,982.21, 2,735.64 and 1,143.05

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Solution

The fourth proportional to 1,982.21, 2,735.64 and 1,143.05 is: 1,577.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.21 : 2,735.64 = 1,143.05 : x
  2. Step 2: Convert to fraction form
    1,982.21/2,735.64 = 1,143.05/x
  3. Step 3: Cross multiply
    1,982.21x = 2,735.64 × 1,143.05
  4. Step 4: Simplify right side
    1,982.21x = 3,126,959.62
  5. Step 5: Solve for x
    x = 3,126,959.62/1,982.21
  6. Step 6: Final answer
    x = 1,577.52

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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.