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Finding the Fourth Proportional to 2,783.74, 3,840.22 and 1,839.90

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Solution

The fourth proportional to 2,783.74, 3,840.22 and 1,839.90 is: 2,538.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.74 : 3,840.22 = 1,839.90 : x
  2. Step 2: Convert to fraction form
    2,783.74/3,840.22 = 1,839.90/x
  3. Step 3: Cross multiply
    2,783.74x = 3,840.22 × 1,839.90
  4. Step 4: Simplify right side
    2,783.74x = 7,065,620.78
  5. Step 5: Solve for x
    x = 7,065,620.78/2,783.74
  6. Step 6: Final answer
    x = 2,538.18

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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.