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Finding the Fourth Proportional to 324.35, 486.34 and 285.92

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Solution

The fourth proportional to 324.35, 486.34 and 285.92 is: 428.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.35 : 486.34 = 285.92 : x
  2. Step 2: Convert to fraction form
    324.35/486.34 = 285.92/x
  3. Step 3: Cross multiply
    324.35x = 486.34 × 285.92
  4. Step 4: Simplify right side
    324.35x = 139,054.33
  5. Step 5: Solve for x
    x = 139,054.33/324.35
  6. Step 6: Final answer
    x = 428.72

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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.