Home / 1,939.38-2,676.93-1,318.74

Finding the Fourth Proportional to 1,939.38, 2,676.93 and 1,318.74

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Solution

The fourth proportional to 1,939.38, 2,676.93 and 1,318.74 is: 1,820.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.38 : 2,676.93 = 1,318.74 : x
  2. Step 2: Convert to fraction form
    1,939.38/2,676.93 = 1,318.74/x
  3. Step 3: Cross multiply
    1,939.38x = 2,676.93 × 1,318.74
  4. Step 4: Simplify right side
    1,939.38x = 3,530,174.67
  5. Step 5: Solve for x
    x = 3,530,174.67/1,939.38
  6. Step 6: Final answer
    x = 1,820.26

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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.