Home / 2,815.78-4,221.38-1,173.56

Finding the Fourth Proportional to 2,815.78, 4,221.38 and 1,173.56

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Solution

The fourth proportional to 2,815.78, 4,221.38 and 1,173.56 is: 1,759.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.78 : 4,221.38 = 1,173.56 : x
  2. Step 2: Convert to fraction form
    2,815.78/4,221.38 = 1,173.56/x
  3. Step 3: Cross multiply
    2,815.78x = 4,221.38 × 1,173.56
  4. Step 4: Simplify right side
    2,815.78x = 4,954,042.71
  5. Step 5: Solve for x
    x = 4,954,042.71/2,815.78
  6. Step 6: Final answer
    x = 1,759.39

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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.