Home / 2,661.28-3,986.94-1,685.36

Finding the Fourth Proportional to 2,661.28, 3,986.94 and 1,685.36

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Solution

The fourth proportional to 2,661.28, 3,986.94 and 1,685.36 is: 2,524.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.28 : 3,986.94 = 1,685.36 : x
  2. Step 2: Convert to fraction form
    2,661.28/3,986.94 = 1,685.36/x
  3. Step 3: Cross multiply
    2,661.28x = 3,986.94 × 1,685.36
  4. Step 4: Simplify right side
    2,661.28x = 6,719,429.20
  5. Step 5: Solve for x
    x = 6,719,429.20/2,661.28
  6. Step 6: Final answer
    x = 2,524.89

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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.