Home / 2,072.97-3,109.14-686.36

Finding the Fourth Proportional to 2,072.97, 3,109.14 and 686.36

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Solution

The fourth proportional to 2,072.97, 3,109.14 and 686.36 is: 1,029.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.97 : 3,109.14 = 686.36 : x
  2. Step 2: Convert to fraction form
    2,072.97/3,109.14 = 686.36/x
  3. Step 3: Cross multiply
    2,072.97x = 3,109.14 × 686.36
  4. Step 4: Simplify right side
    2,072.97x = 2,133,997.10
  5. Step 5: Solve for x
    x = 2,133,997.10/2,072.97
  6. Step 6: Final answer
    x = 1,029.44

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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.