Home / 2,687.58-4,033.80-1,389.96

Finding the Fourth Proportional to 2,687.58, 4,033.80 and 1,389.96

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Solution

The fourth proportional to 2,687.58, 4,033.80 and 1,389.96 is: 2,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.58 : 4,033.80 = 1,389.96 : x
  2. Step 2: Convert to fraction form
    2,687.58/4,033.80 = 1,389.96/x
  3. Step 3: Cross multiply
    2,687.58x = 4,033.80 × 1,389.96
  4. Step 4: Simplify right side
    2,687.58x = 5,606,820.65
  5. Step 5: Solve for x
    x = 5,606,820.65/2,687.58
  6. Step 6: Final answer
    x = 2,086.20

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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.