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Finding the Fourth Proportional to 664.65, 996.75 and 253.58

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Solution

The fourth proportional to 664.65, 996.75 and 253.58 is: 380.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.65 : 996.75 = 253.58 : x
  2. Step 2: Convert to fraction form
    664.65/996.75 = 253.58/x
  3. Step 3: Cross multiply
    664.65x = 996.75 × 253.58
  4. Step 4: Simplify right side
    664.65x = 252,750.88
  5. Step 5: Solve for x
    x = 252,750.88/664.65
  6. Step 6: Final answer
    x = 380.28

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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.