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Finding the Fourth Proportional to 2,839.98, 3,919.98 and 1,720.74

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Solution

The fourth proportional to 2,839.98, 3,919.98 and 1,720.74 is: 2,375.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.98 : 3,919.98 = 1,720.74 : x
  2. Step 2: Convert to fraction form
    2,839.98/3,919.98 = 1,720.74/x
  3. Step 3: Cross multiply
    2,839.98x = 3,919.98 × 1,720.74
  4. Step 4: Simplify right side
    2,839.98x = 6,745,266.39
  5. Step 5: Solve for x
    x = 6,745,266.39/2,839.98
  6. Step 6: Final answer
    x = 2,375.11

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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.