Home / 2,160.14-3,240.24-679.31

Finding the Fourth Proportional to 2,160.14, 3,240.24 and 679.31

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Solution

The fourth proportional to 2,160.14, 3,240.24 and 679.31 is: 1,018.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.14 : 3,240.24 = 679.31 : x
  2. Step 2: Convert to fraction form
    2,160.14/3,240.24 = 679.31/x
  3. Step 3: Cross multiply
    2,160.14x = 3,240.24 × 679.31
  4. Step 4: Simplify right side
    2,160.14x = 2,201,120.84
  5. Step 5: Solve for x
    x = 2,201,120.84/2,160.14
  6. Step 6: Final answer
    x = 1,018.97

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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.