Home / 2,956.40-4,078.60-2,072.79

Finding the Fourth Proportional to 2,956.40, 4,078.60 and 2,072.79

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Solution

The fourth proportional to 2,956.40, 4,078.60 and 2,072.79 is: 2,859.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,956.40 : 4,078.60 = 2,072.79 : x
  2. Step 2: Convert to fraction form
    2,956.40/4,078.60 = 2,072.79/x
  3. Step 3: Cross multiply
    2,956.40x = 4,078.60 × 2,072.79
  4. Step 4: Simplify right side
    2,956.40x = 8,454,087.77
  5. Step 5: Solve for x
    x = 8,454,087.77/2,956.40
  6. Step 6: Final answer
    x = 2,859.59

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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.