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Finding the Fourth Proportional to 330.58, 495.95 and 272.11

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Solution

The fourth proportional to 330.58, 495.95 and 272.11 is: 408.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.58 : 495.95 = 272.11 : x
  2. Step 2: Convert to fraction form
    330.58/495.95 = 272.11/x
  3. Step 3: Cross multiply
    330.58x = 495.95 × 272.11
  4. Step 4: Simplify right side
    330.58x = 134,950.47
  5. Step 5: Solve for x
    x = 134,950.47/330.58
  6. Step 6: Final answer
    x = 408.23

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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.