Home / 1,939.70-2,907.38-1,505.78

Finding the Fourth Proportional to 1,939.70, 2,907.38 and 1,505.78

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Solution

The fourth proportional to 1,939.70, 2,907.38 and 1,505.78 is: 2,256.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.70 : 2,907.38 = 1,505.78 : x
  2. Step 2: Convert to fraction form
    1,939.70/2,907.38 = 1,505.78/x
  3. Step 3: Cross multiply
    1,939.70x = 2,907.38 × 1,505.78
  4. Step 4: Simplify right side
    1,939.70x = 4,377,874.66
  5. Step 5: Solve for x
    x = 4,377,874.66/1,939.70
  6. Step 6: Final answer
    x = 2,256.99

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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.