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Finding the Fourth Proportional to 676.74, 1,015.11 and 163.74

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Solution

The fourth proportional to 676.74, 1,015.11 and 163.74 is: 245.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.74 : 1,015.11 = 163.74 : x
  2. Step 2: Convert to fraction form
    676.74/1,015.11 = 163.74/x
  3. Step 3: Cross multiply
    676.74x = 1,015.11 × 163.74
  4. Step 4: Simplify right side
    676.74x = 166,208.22
  5. Step 5: Solve for x
    x = 166,208.22/676.74
  6. Step 6: Final answer
    x = 245.60

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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.