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Finding the Fourth Proportional to 321.18, 482.34 and 192

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Solution

The fourth proportional to 321.18, 482.34 and 192 is: 288.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.18 : 482.34 = 192 : x
  2. Step 2: Convert to fraction form
    321.18/482.34 = 192/x
  3. Step 3: Cross multiply
    321.18x = 482.34 × 192
  4. Step 4: Simplify right side
    321.18x = 92,609.28
  5. Step 5: Solve for x
    x = 92,609.28/321.18
  6. Step 6: Final answer
    x = 288.34

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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.