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Finding the Fourth Proportional to 1,229.28, 1,843.68 and 363.40

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Solution

The fourth proportional to 1,229.28, 1,843.68 and 363.40 is: 545.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.28 : 1,843.68 = 363.40 : x
  2. Step 2: Convert to fraction form
    1,229.28/1,843.68 = 363.40/x
  3. Step 3: Cross multiply
    1,229.28x = 1,843.68 × 363.40
  4. Step 4: Simplify right side
    1,229.28x = 669,993.31
  5. Step 5: Solve for x
    x = 669,993.31/1,229.28
  6. Step 6: Final answer
    x = 545.03

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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.