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Finding the Fourth Proportional to 485.17, 669.31 and 327.60

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Solution

The fourth proportional to 485.17, 669.31 and 327.60 is: 451.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.17 : 669.31 = 327.60 : x
  2. Step 2: Convert to fraction form
    485.17/669.31 = 327.60/x
  3. Step 3: Cross multiply
    485.17x = 669.31 × 327.60
  4. Step 4: Simplify right side
    485.17x = 219,265.14
  5. Step 5: Solve for x
    x = 219,265.14/485.17
  6. Step 6: Final answer
    x = 451.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.