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Finding the Fourth Proportional to 492.39, 738.59 and 167.78

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Solution

The fourth proportional to 492.39, 738.59 and 167.78 is: 251.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.39 : 738.59 = 167.78 : x
  2. Step 2: Convert to fraction form
    492.39/738.59 = 167.78/x
  3. Step 3: Cross multiply
    492.39x = 738.59 × 167.78
  4. Step 4: Simplify right side
    492.39x = 123,921.64
  5. Step 5: Solve for x
    x = 123,921.64/492.39
  6. Step 6: Final answer
    x = 251.67

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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.