Home / 2,839.50-3,918.11-1,720.49

Finding the Fourth Proportional to 2,839.50, 3,918.11 and 1,720.49

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Solution

The fourth proportional to 2,839.50, 3,918.11 and 1,720.49 is: 2,374.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.50 : 3,918.11 = 1,720.49 : x
  2. Step 2: Convert to fraction form
    2,839.50/3,918.11 = 1,720.49/x
  3. Step 3: Cross multiply
    2,839.50x = 3,918.11 × 1,720.49
  4. Step 4: Simplify right side
    2,839.50x = 6,741,040.88
  5. Step 5: Solve for x
    x = 6,741,040.88/2,839.50
  6. Step 6: Final answer
    x = 2,374.02

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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.