Home / 1,269.70-1,908.60-1,196.80

Finding the Fourth Proportional to 1,269.70, 1,908.60 and 1,196.80

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Solution

The fourth proportional to 1,269.70, 1,908.60 and 1,196.80 is: 1,799.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.70 : 1,908.60 = 1,196.80 : x
  2. Step 2: Convert to fraction form
    1,269.70/1,908.60 = 1,196.80/x
  3. Step 3: Cross multiply
    1,269.70x = 1,908.60 × 1,196.80
  4. Step 4: Simplify right side
    1,269.70x = 2,284,212.48
  5. Step 5: Solve for x
    x = 2,284,212.48/1,269.70
  6. Step 6: Final answer
    x = 1,799.02

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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.