Home / 2,279.21-3,145.38-1,284.53

Finding the Fourth Proportional to 2,279.21, 3,145.38 and 1,284.53

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Solution

The fourth proportional to 2,279.21, 3,145.38 and 1,284.53 is: 1,772.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.21 : 3,145.38 = 1,284.53 : x
  2. Step 2: Convert to fraction form
    2,279.21/3,145.38 = 1,284.53/x
  3. Step 3: Cross multiply
    2,279.21x = 3,145.38 × 1,284.53
  4. Step 4: Simplify right side
    2,279.21x = 4,040,334.97
  5. Step 5: Solve for x
    x = 4,040,334.97/2,279.21
  6. Step 6: Final answer
    x = 1,772.69

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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.