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Finding the Fourth Proportional to 324.64, 486.96 and 108.23

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Solution

The fourth proportional to 324.64, 486.96 and 108.23 is: 162.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.64 : 486.96 = 108.23 : x
  2. Step 2: Convert to fraction form
    324.64/486.96 = 108.23/x
  3. Step 3: Cross multiply
    324.64x = 486.96 × 108.23
  4. Step 4: Simplify right side
    324.64x = 52,703.68
  5. Step 5: Solve for x
    x = 52,703.68/324.64
  6. Step 6: Final answer
    x = 162.35

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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.