Home / 2,687.14-3,708.45-1,639.39

Finding the Fourth Proportional to 2,687.14, 3,708.45 and 1,639.39

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Solution

The fourth proportional to 2,687.14, 3,708.45 and 1,639.39 is: 2,262.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.14 : 3,708.45 = 1,639.39 : x
  2. Step 2: Convert to fraction form
    2,687.14/3,708.45 = 1,639.39/x
  3. Step 3: Cross multiply
    2,687.14x = 3,708.45 × 1,639.39
  4. Step 4: Simplify right side
    2,687.14x = 6,079,595.85
  5. Step 5: Solve for x
    x = 6,079,595.85/2,687.14
  6. Step 6: Final answer
    x = 2,262.48

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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.