Home / 1,687.18-2,528.70-1,379.65

Finding the Fourth Proportional to 1,687.18, 2,528.70 and 1,379.65

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Solution

The fourth proportional to 1,687.18, 2,528.70 and 1,379.65 is: 2,067.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.18 : 2,528.70 = 1,379.65 : x
  2. Step 2: Convert to fraction form
    1,687.18/2,528.70 = 1,379.65/x
  3. Step 3: Cross multiply
    1,687.18x = 2,528.70 × 1,379.65
  4. Step 4: Simplify right side
    1,687.18x = 3,488,720.96
  5. Step 5: Solve for x
    x = 3,488,720.96/1,687.18
  6. Step 6: Final answer
    x = 2,067.78

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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.