Home / 1,394.96-1,919.36-1,279.76

Finding the Fourth Proportional to 1,394.96, 1,919.36 and 1,279.76

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Solution

The fourth proportional to 1,394.96, 1,919.36 and 1,279.76 is: 1,760.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.96 : 1,919.36 = 1,279.76 : x
  2. Step 2: Convert to fraction form
    1,394.96/1,919.36 = 1,279.76/x
  3. Step 3: Cross multiply
    1,394.96x = 1,919.36 × 1,279.76
  4. Step 4: Simplify right side
    1,394.96x = 2,456,320.15
  5. Step 5: Solve for x
    x = 2,456,320.15/1,394.96
  6. Step 6: Final answer
    x = 1,760.85

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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.