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Finding the Fourth Proportional to 665.77, 998.71 and 178.82

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Solution

The fourth proportional to 665.77, 998.71 and 178.82 is: 268.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.77 : 998.71 = 178.82 : x
  2. Step 2: Convert to fraction form
    665.77/998.71 = 178.82/x
  3. Step 3: Cross multiply
    665.77x = 998.71 × 178.82
  4. Step 4: Simplify right side
    665.77x = 178,589.32
  5. Step 5: Solve for x
    x = 178,589.32/665.77
  6. Step 6: Final answer
    x = 268.24

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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.