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Finding the Fourth Proportional to 798.89, 1,198.06 and 490.88

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Solution

The fourth proportional to 798.89, 1,198.06 and 490.88 is: 736.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.89 : 1,198.06 = 490.88 : x
  2. Step 2: Convert to fraction form
    798.89/1,198.06 = 490.88/x
  3. Step 3: Cross multiply
    798.89x = 1,198.06 × 490.88
  4. Step 4: Simplify right side
    798.89x = 588,105.46
  5. Step 5: Solve for x
    x = 588,105.46/798.89
  6. Step 6: Final answer
    x = 736.16

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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.