Home / 1,720.03-2,578.81-1,391.37

Finding the Fourth Proportional to 1,720.03, 2,578.81 and 1,391.37

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Solution

The fourth proportional to 1,720.03, 2,578.81 and 1,391.37 is: 2,086.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.03 : 2,578.81 = 1,391.37 : x
  2. Step 2: Convert to fraction form
    1,720.03/2,578.81 = 1,391.37/x
  3. Step 3: Cross multiply
    1,720.03x = 2,578.81 × 1,391.37
  4. Step 4: Simplify right side
    1,720.03x = 3,588,078.87
  5. Step 5: Solve for x
    x = 3,588,078.87/1,720.03
  6. Step 6: Final answer
    x = 2,086.06

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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.