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Finding the Fourth Proportional to 1,959.36, 2,936.64 and 1,311.36

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Solution

The fourth proportional to 1,959.36, 2,936.64 and 1,311.36 is: 1,965.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,959.36 : 2,936.64 = 1,311.36 : x
  2. Step 2: Convert to fraction form
    1,959.36/2,936.64 = 1,311.36/x
  3. Step 3: Cross multiply
    1,959.36x = 2,936.64 × 1,311.36
  4. Step 4: Simplify right side
    1,959.36x = 3,850,992.23
  5. Step 5: Solve for x
    x = 3,850,992.23/1,959.36
  6. Step 6: Final answer
    x = 1,965.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.