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Finding the Fourth Proportional to 324.86, 486.80 and 162.66

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Solution

The fourth proportional to 324.86, 486.80 and 162.66 is: 243.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.86 : 486.80 = 162.66 : x
  2. Step 2: Convert to fraction form
    324.86/486.80 = 162.66/x
  3. Step 3: Cross multiply
    324.86x = 486.80 × 162.66
  4. Step 4: Simplify right side
    324.86x = 79,182.89
  5. Step 5: Solve for x
    x = 79,182.89/324.86
  6. Step 6: Final answer
    x = 243.74

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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.