Home / 1,279.76-1,769.21-1,268.06

Finding the Fourth Proportional to 1,279.76, 1,769.21 and 1,268.06

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Solution

The fourth proportional to 1,279.76, 1,769.21 and 1,268.06 is: 1,753.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.76 : 1,769.21 = 1,268.06 : x
  2. Step 2: Convert to fraction form
    1,279.76/1,769.21 = 1,268.06/x
  3. Step 3: Cross multiply
    1,279.76x = 1,769.21 × 1,268.06
  4. Step 4: Simplify right side
    1,279.76x = 2,243,464.43
  5. Step 5: Solve for x
    x = 2,243,464.43/1,279.76
  6. Step 6: Final answer
    x = 1,753.04

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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.