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Finding the Fourth Proportional to 3,391.54, 4,680.12 and 1,994.20

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Solution

The fourth proportional to 3,391.54, 4,680.12 and 1,994.20 is: 2,751.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.54 : 4,680.12 = 1,994.20 : x
  2. Step 2: Convert to fraction form
    3,391.54/4,680.12 = 1,994.20/x
  3. Step 3: Cross multiply
    3,391.54x = 4,680.12 × 1,994.20
  4. Step 4: Simplify right side
    3,391.54x = 9,333,095.30
  5. Step 5: Solve for x
    x = 9,333,095.30/3,391.54
  6. Step 6: Final answer
    x = 2,751.88

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1.5x scale

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.