Home / 2,839.71-3,918.89-1,720.86

Finding the Fourth Proportional to 2,839.71, 3,918.89 and 1,720.86

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Solution

The fourth proportional to 2,839.71, 3,918.89 and 1,720.86 is: 2,374.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.71 : 3,918.89 = 1,720.86 : x
  2. Step 2: Convert to fraction form
    2,839.71/3,918.89 = 1,720.86/x
  3. Step 3: Cross multiply
    2,839.71x = 3,918.89 × 1,720.86
  4. Step 4: Simplify right side
    2,839.71x = 6,743,861.05
  5. Step 5: Solve for x
    x = 6,743,861.05/2,839.71
  6. Step 6: Final answer
    x = 2,374.84

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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.