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Finding the Fourth Proportional to 320.71, 481.15 and 104.30

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Solution

The fourth proportional to 320.71, 481.15 and 104.30 is: 156.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.71 : 481.15 = 104.30 : x
  2. Step 2: Convert to fraction form
    320.71/481.15 = 104.30/x
  3. Step 3: Cross multiply
    320.71x = 481.15 × 104.30
  4. Step 4: Simplify right side
    320.71x = 50,183.95
  5. Step 5: Solve for x
    x = 50,183.95/320.71
  6. Step 6: Final answer
    x = 156.48

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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.