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Finding the Fourth Proportional to 664.30, 996.60 and 254.09

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Solution

The fourth proportional to 664.30, 996.60 and 254.09 is: 381.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.30 : 996.60 = 254.09 : x
  2. Step 2: Convert to fraction form
    664.30/996.60 = 254.09/x
  3. Step 3: Cross multiply
    664.30x = 996.60 × 254.09
  4. Step 4: Simplify right side
    664.30x = 253,223.93
  5. Step 5: Solve for x
    x = 253,223.93/664.30
  6. Step 6: Final answer
    x = 381.19

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Double scale
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1.5x scale

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.