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Finding the Fourth Proportional to 1,198.40, 1,797.76 and 320.96

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Solution

The fourth proportional to 1,198.40, 1,797.76 and 320.96 is: 481.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.40 : 1,797.76 = 320.96 : x
  2. Step 2: Convert to fraction form
    1,198.40/1,797.76 = 320.96/x
  3. Step 3: Cross multiply
    1,198.40x = 1,797.76 × 320.96
  4. Step 4: Simplify right side
    1,198.40x = 577,009.05
  5. Step 5: Solve for x
    x = 577,009.05/1,198.40
  6. Step 6: Final answer
    x = 481.48

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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.