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Finding the Fourth Proportional to 2,185.64, 3,278.90 and 798.85

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Solution

The fourth proportional to 2,185.64, 3,278.90 and 798.85 is: 1,198.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.64 : 3,278.90 = 798.85 : x
  2. Step 2: Convert to fraction form
    2,185.64/3,278.90 = 798.85/x
  3. Step 3: Cross multiply
    2,185.64x = 3,278.90 × 798.85
  4. Step 4: Simplify right side
    2,185.64x = 2,619,345.27
  5. Step 5: Solve for x
    x = 2,619,345.27/2,185.64
  6. Step 6: Final answer
    x = 1,198.43

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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.