Home / 4,279.20-6,418.80-1,200.80

Finding the Fourth Proportional to 4,279.20, 6,418.80 and 1,200.80

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Solution

The fourth proportional to 4,279.20, 6,418.80 and 1,200.80 is: 1,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,279.20 : 6,418.80 = 1,200.80 : x
  2. Step 2: Convert to fraction form
    4,279.20/6,418.80 = 1,200.80/x
  3. Step 3: Cross multiply
    4,279.20x = 6,418.80 × 1,200.80
  4. Step 4: Simplify right side
    4,279.20x = 7,707,695.04
  5. Step 5: Solve for x
    x = 7,707,695.04/4,279.20
  6. Step 6: Final answer
    x = 1,801.20

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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.