Home / 2,511.50-3,769.60-1,279.80

Finding the Fourth Proportional to 2,511.50, 3,769.60 and 1,279.80

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Solution

The fourth proportional to 2,511.50, 3,769.60 and 1,279.80 is: 1,920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,511.50 : 3,769.60 = 1,279.80 : x
  2. Step 2: Convert to fraction form
    2,511.50/3,769.60 = 1,279.80/x
  3. Step 3: Cross multiply
    2,511.50x = 3,769.60 × 1,279.80
  4. Step 4: Simplify right side
    2,511.50x = 4,824,334.08
  5. Step 5: Solve for x
    x = 4,824,334.08/2,511.50
  6. Step 6: Final answer
    x = 1,920.90

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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.