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Finding the Fourth Proportional to 665.73, 998.43 and 178.77

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Solution

The fourth proportional to 665.73, 998.43 and 178.77 is: 268.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.73 : 998.43 = 178.77 : x
  2. Step 2: Convert to fraction form
    665.73/998.43 = 178.77/x
  3. Step 3: Cross multiply
    665.73x = 998.43 × 178.77
  4. Step 4: Simplify right side
    665.73x = 178,489.33
  5. Step 5: Solve for x
    x = 178,489.33/665.73
  6. Step 6: Final answer
    x = 268.11

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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.