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Finding the Fourth Proportional to 330.85, 495.66 and 193.50

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Solution

The fourth proportional to 330.85, 495.66 and 193.50 is: 289.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.85 : 495.66 = 193.50 : x
  2. Step 2: Convert to fraction form
    330.85/495.66 = 193.50/x
  3. Step 3: Cross multiply
    330.85x = 495.66 × 193.50
  4. Step 4: Simplify right side
    330.85x = 95,910.21
  5. Step 5: Solve for x
    x = 95,910.21/330.85
  6. Step 6: Final answer
    x = 289.89

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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.