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Finding the Fourth Proportional to 320.64, 481.03 and 104.20

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Solution

The fourth proportional to 320.64, 481.03 and 104.20 is: 156.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.64 : 481.03 = 104.20 : x
  2. Step 2: Convert to fraction form
    320.64/481.03 = 104.20/x
  3. Step 3: Cross multiply
    320.64x = 481.03 × 104.20
  4. Step 4: Simplify right side
    320.64x = 50,124.86
  5. Step 5: Solve for x
    x = 50,124.86/320.64
  6. Step 6: Final answer
    x = 156.33

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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.