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Finding the Fourth Proportional to 324.21, 486.30 and 104.85

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Solution

The fourth proportional to 324.21, 486.30 and 104.85 is: 157.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.21 : 486.30 = 104.85 : x
  2. Step 2: Convert to fraction form
    324.21/486.30 = 104.85/x
  3. Step 3: Cross multiply
    324.21x = 486.30 × 104.85
  4. Step 4: Simplify right side
    324.21x = 50,988.95
  5. Step 5: Solve for x
    x = 50,988.95/324.21
  6. Step 6: Final answer
    x = 157.27

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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.