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Finding the Fourth Proportional to 354.45, 531.49 and 192

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Solution

The fourth proportional to 354.45, 531.49 and 192 is: 287.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.45 : 531.49 = 192 : x
  2. Step 2: Convert to fraction form
    354.45/531.49 = 192/x
  3. Step 3: Cross multiply
    354.45x = 531.49 × 192
  4. Step 4: Simplify right side
    354.45x = 102,046.08
  5. Step 5: Solve for x
    x = 102,046.08/354.45
  6. Step 6: Final answer
    x = 287.90

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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.