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Finding the Fourth Proportional to 492.31, 738.21 and 167.57

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Solution

The fourth proportional to 492.31, 738.21 and 167.57 is: 251.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.31 : 738.21 = 167.57 : x
  2. Step 2: Convert to fraction form
    492.31/738.21 = 167.57/x
  3. Step 3: Cross multiply
    492.31x = 738.21 × 167.57
  4. Step 4: Simplify right side
    492.31x = 123,701.85
  5. Step 5: Solve for x
    x = 123,701.85/492.31
  6. Step 6: Final answer
    x = 251.27

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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.