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Finding the Fourth Proportional to 3,391.52, 4,680 and 1,994

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Solution

The fourth proportional to 3,391.52, 4,680 and 1,994 is: 2,751.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.52 : 4,680 = 1,994 : x
  2. Step 2: Convert to fraction form
    3,391.52/4,680 = 1,994/x
  3. Step 3: Cross multiply
    3,391.52x = 4,680 × 1,994
  4. Step 4: Simplify right side
    3,391.52x = 9,331,920
  5. Step 5: Solve for x
    x = 9,331,920/3,391.52
  6. Step 6: Final answer
    x = 2,751.55

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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.