Home / 2,660.64-3,991.59-1,687.56

Finding the Fourth Proportional to 2,660.64, 3,991.59 and 1,687.56

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Solution

The fourth proportional to 2,660.64, 3,991.59 and 1,687.56 is: 2,531.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.64 : 3,991.59 = 1,687.56 : x
  2. Step 2: Convert to fraction form
    2,660.64/3,991.59 = 1,687.56/x
  3. Step 3: Cross multiply
    2,660.64x = 3,991.59 × 1,687.56
  4. Step 4: Simplify right side
    2,660.64x = 6,736,047.62
  5. Step 5: Solve for x
    x = 6,736,047.62/2,660.64
  6. Step 6: Final answer
    x = 2,531.74

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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.