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Finding the Fourth Proportional to 2,198.54, 3,297.72 and 638.51

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Solution

The fourth proportional to 2,198.54, 3,297.72 and 638.51 is: 957.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,198.54 : 3,297.72 = 638.51 : x
  2. Step 2: Convert to fraction form
    2,198.54/3,297.72 = 638.51/x
  3. Step 3: Cross multiply
    2,198.54x = 3,297.72 × 638.51
  4. Step 4: Simplify right side
    2,198.54x = 2,105,635.44
  5. Step 5: Solve for x
    x = 2,105,635.44/2,198.54
  6. Step 6: Final answer
    x = 957.74

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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.