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Finding the Fourth Proportional to 330.60, 454.11 and 320.88

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Solution

The fourth proportional to 330.60, 454.11 and 320.88 is: 440.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.60 : 454.11 = 320.88 : x
  2. Step 2: Convert to fraction form
    330.60/454.11 = 320.88/x
  3. Step 3: Cross multiply
    330.60x = 454.11 × 320.88
  4. Step 4: Simplify right side
    330.60x = 145,714.82
  5. Step 5: Solve for x
    x = 145,714.82/330.60
  6. Step 6: Final answer
    x = 440.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.