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Finding the Fourth Proportional to 1,998.28, 2,998.96 and 1,304.76

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Solution

The fourth proportional to 1,998.28, 2,998.96 and 1,304.76 is: 1,958.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.28 : 2,998.96 = 1,304.76 : x
  2. Step 2: Convert to fraction form
    1,998.28/2,998.96 = 1,304.76/x
  3. Step 3: Cross multiply
    1,998.28x = 2,998.96 × 1,304.76
  4. Step 4: Simplify right side
    1,998.28x = 3,912,923.05
  5. Step 5: Solve for x
    x = 3,912,923.05/1,998.28
  6. Step 6: Final answer
    x = 1,958.15

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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.