Home / 2,956.78-4,081.80-1,909.45

Finding the Fourth Proportional to 2,956.78, 4,081.80 and 1,909.45

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Solution

The fourth proportional to 2,956.78, 4,081.80 and 1,909.45 is: 2,635.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,956.78 : 4,081.80 = 1,909.45 : x
  2. Step 2: Convert to fraction form
    2,956.78/4,081.80 = 1,909.45/x
  3. Step 3: Cross multiply
    2,956.78x = 4,081.80 × 1,909.45
  4. Step 4: Simplify right side
    2,956.78x = 7,793,993.01
  5. Step 5: Solve for x
    x = 7,793,993.01/2,956.78
  6. Step 6: Final answer
    x = 2,635.97

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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.