Home / 1,720.11-2,375.70-1,331.85

Finding the Fourth Proportional to 1,720.11, 2,375.70 and 1,331.85

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Solution

The fourth proportional to 1,720.11, 2,375.70 and 1,331.85 is: 1,839.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.11 : 2,375.70 = 1,331.85 : x
  2. Step 2: Convert to fraction form
    1,720.11/2,375.70 = 1,331.85/x
  3. Step 3: Cross multiply
    1,720.11x = 2,375.70 × 1,331.85
  4. Step 4: Simplify right side
    1,720.11x = 3,164,076.05
  5. Step 5: Solve for x
    x = 3,164,076.05/1,720.11
  6. Step 6: Final answer
    x = 1,839.46

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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.