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Finding the Fourth Proportional to 324.86, 446.36 and 310.55

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Solution

The fourth proportional to 324.86, 446.36 and 310.55 is: 426.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.86 : 446.36 = 310.55 : x
  2. Step 2: Convert to fraction form
    324.86/446.36 = 310.55/x
  3. Step 3: Cross multiply
    324.86x = 446.36 × 310.55
  4. Step 4: Simplify right side
    324.86x = 138,613.31
  5. Step 5: Solve for x
    x = 138,613.31/324.86
  6. Step 6: Final answer
    x = 426.69

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.