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Finding the Fourth Proportional to 3,246.31, 4,480.07 and 1,986.97

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Solution

The fourth proportional to 3,246.31, 4,480.07 and 1,986.97 is: 2,742.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,246.31 : 4,480.07 = 1,986.97 : x
  2. Step 2: Convert to fraction form
    3,246.31/4,480.07 = 1,986.97/x
  3. Step 3: Cross multiply
    3,246.31x = 4,480.07 × 1,986.97
  4. Step 4: Simplify right side
    3,246.31x = 8,901,764.69
  5. Step 5: Solve for x
    x = 8,901,764.69/3,246.31
  6. Step 6: Final answer
    x = 2,742.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.