Home / 2,072.49-3,109.26-686.04

Finding the Fourth Proportional to 2,072.49, 3,109.26 and 686.04

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Solution

The fourth proportional to 2,072.49, 3,109.26 and 686.04 is: 1,029.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.49 : 3,109.26 = 686.04 : x
  2. Step 2: Convert to fraction form
    2,072.49/3,109.26 = 686.04/x
  3. Step 3: Cross multiply
    2,072.49x = 3,109.26 × 686.04
  4. Step 4: Simplify right side
    2,072.49x = 2,133,076.73
  5. Step 5: Solve for x
    x = 2,133,076.73/2,072.49
  6. Step 6: Final answer
    x = 1,029.23

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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.