Home / 2,956.20-4,078.82-1,907

Finding the Fourth Proportional to 2,956.20, 4,078.82 and 1,907

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Solution

The fourth proportional to 2,956.20, 4,078.82 and 1,907 is: 2,631.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,956.20 : 4,078.82 = 1,907 : x
  2. Step 2: Convert to fraction form
    2,956.20/4,078.82 = 1,907/x
  3. Step 3: Cross multiply
    2,956.20x = 4,078.82 × 1,907
  4. Step 4: Simplify right side
    2,956.20x = 7,778,309.74
  5. Step 5: Solve for x
    x = 7,778,309.74/2,956.20
  6. Step 6: Final answer
    x = 2,631.19

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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.