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Finding the Fourth Proportional to 321.75, 482.20 and 167.35

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Solution

The fourth proportional to 321.75, 482.20 and 167.35 is: 250.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.75 : 482.20 = 167.35 : x
  2. Step 2: Convert to fraction form
    321.75/482.20 = 167.35/x
  3. Step 3: Cross multiply
    321.75x = 482.20 × 167.35
  4. Step 4: Simplify right side
    321.75x = 80,695.33
  5. Step 5: Solve for x
    x = 80,695.33/321.75
  6. Step 6: Final answer
    x = 250.80

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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.