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Finding the Fourth Proportional to 330.94, 456.40 and 238.29

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Solution

The fourth proportional to 330.94, 456.40 and 238.29 is: 328.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.94 : 456.40 = 238.29 : x
  2. Step 2: Convert to fraction form
    330.94/456.40 = 238.29/x
  3. Step 3: Cross multiply
    330.94x = 456.40 × 238.29
  4. Step 4: Simplify right side
    330.94x = 108,755.56
  5. Step 5: Solve for x
    x = 108,755.56/330.94
  6. Step 6: Final answer
    x = 328.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.