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Finding the Fourth Proportional to 797.89, 1,196.82 and 311.28

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Solution

The fourth proportional to 797.89, 1,196.82 and 311.28 is: 466.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.89 : 1,196.82 = 311.28 : x
  2. Step 2: Convert to fraction form
    797.89/1,196.82 = 311.28/x
  3. Step 3: Cross multiply
    797.89x = 1,196.82 × 311.28
  4. Step 4: Simplify right side
    797.89x = 372,546.13
  5. Step 5: Solve for x
    x = 372,546.13/797.89
  6. Step 6: Final answer
    x = 466.91

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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.