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Finding the Fourth Proportional to 320.96, 481.20 and 243.92

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Solution

The fourth proportional to 320.96, 481.20 and 243.92 is: 365.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.96 : 481.20 = 243.92 : x
  2. Step 2: Convert to fraction form
    320.96/481.20 = 243.92/x
  3. Step 3: Cross multiply
    320.96x = 481.20 × 243.92
  4. Step 4: Simplify right side
    320.96x = 117,374.30
  5. Step 5: Solve for x
    x = 117,374.30/320.96
  6. Step 6: Final answer
    x = 365.70

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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.