Home / 1,939.11-2,675.50-1,310.79

Finding the Fourth Proportional to 1,939.11, 2,675.50 and 1,310.79

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Solution

The fourth proportional to 1,939.11, 2,675.50 and 1,310.79 is: 1,808.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.11 : 2,675.50 = 1,310.79 : x
  2. Step 2: Convert to fraction form
    1,939.11/2,675.50 = 1,310.79/x
  3. Step 3: Cross multiply
    1,939.11x = 2,675.50 × 1,310.79
  4. Step 4: Simplify right side
    1,939.11x = 3,507,018.65
  5. Step 5: Solve for x
    x = 3,507,018.65/1,939.11
  6. Step 6: Final answer
    x = 1,808.57

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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.