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Finding the Fourth Proportional to 664.56, 996.88 and 177.60

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Solution

The fourth proportional to 664.56, 996.88 and 177.60 is: 266.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.56 : 996.88 = 177.60 : x
  2. Step 2: Convert to fraction form
    664.56/996.88 = 177.60/x
  3. Step 3: Cross multiply
    664.56x = 996.88 × 177.60
  4. Step 4: Simplify right side
    664.56x = 177,045.89
  5. Step 5: Solve for x
    x = 177,045.89/664.56
  6. Step 6: Final answer
    x = 266.41

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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.