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Finding the Fourth Proportional to 798.69, 1,198.45 and 305.43

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Solution

The fourth proportional to 798.69, 1,198.45 and 305.43 is: 458.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.69 : 1,198.45 = 305.43 : x
  2. Step 2: Convert to fraction form
    798.69/1,198.45 = 305.43/x
  3. Step 3: Cross multiply
    798.69x = 1,198.45 × 305.43
  4. Step 4: Simplify right side
    798.69x = 366,042.97
  5. Step 5: Solve for x
    x = 366,042.97/798.69
  6. Step 6: Final answer
    x = 458.31

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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.