Home / 1,319.03-1,976.72-1,279.61

Finding the Fourth Proportional to 1,319.03, 1,976.72 and 1,279.61

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Solution

The fourth proportional to 1,319.03, 1,976.72 and 1,279.61 is: 1,917.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.03 : 1,976.72 = 1,279.61 : x
  2. Step 2: Convert to fraction form
    1,319.03/1,976.72 = 1,279.61/x
  3. Step 3: Cross multiply
    1,319.03x = 1,976.72 × 1,279.61
  4. Step 4: Simplify right side
    1,319.03x = 2,529,414.40
  5. Step 5: Solve for x
    x = 2,529,414.40/1,319.03
  6. Step 6: Final answer
    x = 1,917.64

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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.