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Finding the Fourth Proportional to 452.50, 678.40 and 327.42

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Solution

The fourth proportional to 452.50, 678.40 and 327.42 is: 490.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.50 : 678.40 = 327.42 : x
  2. Step 2: Convert to fraction form
    452.50/678.40 = 327.42/x
  3. Step 3: Cross multiply
    452.50x = 678.40 × 327.42
  4. Step 4: Simplify right side
    452.50x = 222,120.91
  5. Step 5: Solve for x
    x = 222,120.91/452.50
  6. Step 6: Final answer
    x = 490.88

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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.