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Finding the Fourth Proportional to 674.56, 1,011.24 and 327.70

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Solution

The fourth proportional to 674.56, 1,011.24 and 327.70 is: 491.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.56 : 1,011.24 = 327.70 : x
  2. Step 2: Convert to fraction form
    674.56/1,011.24 = 327.70/x
  3. Step 3: Cross multiply
    674.56x = 1,011.24 × 327.70
  4. Step 4: Simplify right side
    674.56x = 331,383.35
  5. Step 5: Solve for x
    x = 331,383.35/674.56
  6. Step 6: Final answer
    x = 491.26

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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.