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Finding the Fourth Proportional to 674.50, 1,011.48 and 327.55

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Solution

The fourth proportional to 674.50, 1,011.48 and 327.55 is: 491.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.50 : 1,011.48 = 327.55 : x
  2. Step 2: Convert to fraction form
    674.50/1,011.48 = 327.55/x
  3. Step 3: Cross multiply
    674.50x = 1,011.48 × 327.55
  4. Step 4: Simplify right side
    674.50x = 331,310.27
  5. Step 5: Solve for x
    x = 331,310.27/674.50
  6. Step 6: Final answer
    x = 491.19

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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.