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Finding the Fourth Proportional to 330.12, 493.97 and 248.76

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Solution

The fourth proportional to 330.12, 493.97 and 248.76 is: 372.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.12 : 493.97 = 248.76 : x
  2. Step 2: Convert to fraction form
    330.12/493.97 = 248.76/x
  3. Step 3: Cross multiply
    330.12x = 493.97 × 248.76
  4. Step 4: Simplify right side
    330.12x = 122,878.73
  5. Step 5: Solve for x
    x = 122,878.73/330.12
  6. Step 6: Final answer
    x = 372.22

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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.