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Finding the Fourth Proportional to 331.92, 493.70 and 330.81

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Solution

The fourth proportional to 331.92, 493.70 and 330.81 is: 492.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.92 : 493.70 = 330.81 : x
  2. Step 2: Convert to fraction form
    331.92/493.70 = 330.81/x
  3. Step 3: Cross multiply
    331.92x = 493.70 × 330.81
  4. Step 4: Simplify right side
    331.92x = 163,319.24
  5. Step 5: Solve for x
    x = 163,319.24/331.92
  6. Step 6: Final answer
    x = 492.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.