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Finding the Fourth Proportional to 1,839.50, 2,759.42 and 684.98

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Solution

The fourth proportional to 1,839.50, 2,759.42 and 684.98 is: 1,027.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.50 : 2,759.42 = 684.98 : x
  2. Step 2: Convert to fraction form
    1,839.50/2,759.42 = 684.98/x
  3. Step 3: Cross multiply
    1,839.50x = 2,759.42 × 684.98
  4. Step 4: Simplify right side
    1,839.50x = 1,890,135.43
  5. Step 5: Solve for x
    x = 1,890,135.43/1,839.50
  6. Step 6: Final answer
    x = 1,027.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.