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Finding the Fourth Proportional to 461.82, 690.60 and 338.79

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Solution

The fourth proportional to 461.82, 690.60 and 338.79 is: 506.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.82 : 690.60 = 338.79 : x
  2. Step 2: Convert to fraction form
    461.82/690.60 = 338.79/x
  3. Step 3: Cross multiply
    461.82x = 690.60 × 338.79
  4. Step 4: Simplify right side
    461.82x = 233,968.37
  5. Step 5: Solve for x
    x = 233,968.37/461.82
  6. Step 6: Final answer
    x = 506.62

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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.