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Finding the Fourth Proportional to 330.29, 455.78 and 190.41

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Solution

The fourth proportional to 330.29, 455.78 and 190.41 is: 262.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.29 : 455.78 = 190.41 : x
  2. Step 2: Convert to fraction form
    330.29/455.78 = 190.41/x
  3. Step 3: Cross multiply
    330.29x = 455.78 × 190.41
  4. Step 4: Simplify right side
    330.29x = 86,785.12
  5. Step 5: Solve for x
    x = 86,785.12/330.29
  6. Step 6: Final answer
    x = 262.76

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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.