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Finding the Fourth Proportional to 2,798.78, 4,198.08 and 949.88

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Solution

The fourth proportional to 2,798.78, 4,198.08 and 949.88 is: 1,424.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.78 : 4,198.08 = 949.88 : x
  2. Step 2: Convert to fraction form
    2,798.78/4,198.08 = 949.88/x
  3. Step 3: Cross multiply
    2,798.78x = 4,198.08 × 949.88
  4. Step 4: Simplify right side
    2,798.78x = 3,987,672.23
  5. Step 5: Solve for x
    x = 3,987,672.23/2,798.78
  6. Step 6: Final answer
    x = 1,424.79

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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.