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Finding the Fourth Proportional to 492.20, 678.98 and 334.76

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Solution

The fourth proportional to 492.20, 678.98 and 334.76 is: 461.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.20 : 678.98 = 334.76 : x
  2. Step 2: Convert to fraction form
    492.20/678.98 = 334.76/x
  3. Step 3: Cross multiply
    492.20x = 678.98 × 334.76
  4. Step 4: Simplify right side
    492.20x = 227,295.34
  5. Step 5: Solve for x
    x = 227,295.34/492.20
  6. Step 6: Final answer
    x = 461.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.