Home / 1,939.57-2,905.70-1,720.87

Finding the Fourth Proportional to 1,939.57, 2,905.70 and 1,720.87

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Solution

The fourth proportional to 1,939.57, 2,905.70 and 1,720.87 is: 2,578.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.57 : 2,905.70 = 1,720.87 : x
  2. Step 2: Convert to fraction form
    1,939.57/2,905.70 = 1,720.87/x
  3. Step 3: Cross multiply
    1,939.57x = 2,905.70 × 1,720.87
  4. Step 4: Simplify right side
    1,939.57x = 5,000,316.09
  5. Step 5: Solve for x
    x = 5,000,316.09/1,939.57
  6. Step 6: Final answer
    x = 2,578.06

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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.