Home / 2,575.40-3,863.10-1,279.40

Finding the Fourth Proportional to 2,575.40, 3,863.10 and 1,279.40

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Solution

The fourth proportional to 2,575.40, 3,863.10 and 1,279.40 is: 1,919.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,575.40 : 3,863.10 = 1,279.40 : x
  2. Step 2: Convert to fraction form
    2,575.40/3,863.10 = 1,279.40/x
  3. Step 3: Cross multiply
    2,575.40x = 3,863.10 × 1,279.40
  4. Step 4: Simplify right side
    2,575.40x = 4,942,450.14
  5. Step 5: Solve for x
    x = 4,942,450.14/2,575.40
  6. Step 6: Final answer
    x = 1,919.10

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1.5x scale

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.