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Finding the Fourth Proportional to 321.34, 482.15 and 167.38

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Solution

The fourth proportional to 321.34, 482.15 and 167.38 is: 251.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.34 : 482.15 = 167.38 : x
  2. Step 2: Convert to fraction form
    321.34/482.15 = 167.38/x
  3. Step 3: Cross multiply
    321.34x = 482.15 × 167.38
  4. Step 4: Simplify right side
    321.34x = 80,702.27
  5. Step 5: Solve for x
    x = 80,702.27/321.34
  6. Step 6: Final answer
    x = 251.14

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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.