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Finding the Fourth Proportional to 669.75, 1,004.99 and 327.75

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Solution

The fourth proportional to 669.75, 1,004.99 and 327.75 is: 491.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.75 : 1,004.99 = 327.75 : x
  2. Step 2: Convert to fraction form
    669.75/1,004.99 = 327.75/x
  3. Step 3: Cross multiply
    669.75x = 1,004.99 × 327.75
  4. Step 4: Simplify right side
    669.75x = 329,383.83
  5. Step 5: Solve for x
    x = 329,383.83/669.75
  6. Step 6: Final answer
    x = 491.80

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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.