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Finding the Fourth Proportional to 663.88, 995.82 and 279.13

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Solution

The fourth proportional to 663.88, 995.82 and 279.13 is: 418.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.88 : 995.82 = 279.13 : x
  2. Step 2: Convert to fraction form
    663.88/995.82 = 279.13/x
  3. Step 3: Cross multiply
    663.88x = 995.82 × 279.13
  4. Step 4: Simplify right side
    663.88x = 277,958.26
  5. Step 5: Solve for x
    x = 277,958.26/663.88
  6. Step 6: Final answer
    x = 418.69

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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.