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Finding the Fourth Proportional to 485.08, 668.76 and 329.56

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Solution

The fourth proportional to 485.08, 668.76 and 329.56 is: 454.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.08 : 668.76 = 329.56 : x
  2. Step 2: Convert to fraction form
    485.08/668.76 = 329.56/x
  3. Step 3: Cross multiply
    485.08x = 668.76 × 329.56
  4. Step 4: Simplify right side
    485.08x = 220,396.55
  5. Step 5: Solve for x
    x = 220,396.55/485.08
  6. Step 6: Final answer
    x = 454.35

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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.