Home / 3,279.80-4,922.90-1,638.20

Finding the Fourth Proportional to 3,279.80, 4,922.90 and 1,638.20

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Solution

The fourth proportional to 3,279.80, 4,922.90 and 1,638.20 is: 2,458.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.80 : 4,922.90 = 1,638.20 : x
  2. Step 2: Convert to fraction form
    3,279.80/4,922.90 = 1,638.20/x
  3. Step 3: Cross multiply
    3,279.80x = 4,922.90 × 1,638.20
  4. Step 4: Simplify right side
    3,279.80x = 8,064,694.78
  5. Step 5: Solve for x
    x = 8,064,694.78/3,279.80
  6. Step 6: Final answer
    x = 2,458.90

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1.5x scale

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.