Home / 1,279.43-1,766.09-1,101.73

Finding the Fourth Proportional to 1,279.43, 1,766.09 and 1,101.73

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Solution

The fourth proportional to 1,279.43, 1,766.09 and 1,101.73 is: 1,520.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.43 : 1,766.09 = 1,101.73 : x
  2. Step 2: Convert to fraction form
    1,279.43/1,766.09 = 1,101.73/x
  3. Step 3: Cross multiply
    1,279.43x = 1,766.09 × 1,101.73
  4. Step 4: Simplify right side
    1,279.43x = 1,945,744.41
  5. Step 5: Solve for x
    x = 1,945,744.41/1,279.43
  6. Step 6: Final answer
    x = 1,520.80

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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.