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Finding the Fourth Proportional to 330.43, 493.23 and 306

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Solution

The fourth proportional to 330.43, 493.23 and 306 is: 456.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.43 : 493.23 = 306 : x
  2. Step 2: Convert to fraction form
    330.43/493.23 = 306/x
  3. Step 3: Cross multiply
    330.43x = 493.23 × 306
  4. Step 4: Simplify right side
    330.43x = 150,928.38
  5. Step 5: Solve for x
    x = 150,928.38/330.43
  6. Step 6: Final answer
    x = 456.76

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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.