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Finding the Fourth Proportional to 813.24, 1,122.37 and 481.67

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Solution

The fourth proportional to 813.24, 1,122.37 and 481.67 is: 664.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.24 : 1,122.37 = 481.67 : x
  2. Step 2: Convert to fraction form
    813.24/1,122.37 = 481.67/x
  3. Step 3: Cross multiply
    813.24x = 1,122.37 × 481.67
  4. Step 4: Simplify right side
    813.24x = 540,609.35
  5. Step 5: Solve for x
    x = 540,609.35/813.24
  6. Step 6: Final answer
    x = 664.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.