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Finding the Fourth Proportional to 424.82, 636.80 and 177.68

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Solution

The fourth proportional to 424.82, 636.80 and 177.68 is: 266.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.82 : 636.80 = 177.68 : x
  2. Step 2: Convert to fraction form
    424.82/636.80 = 177.68/x
  3. Step 3: Cross multiply
    424.82x = 636.80 × 177.68
  4. Step 4: Simplify right side
    424.82x = 113,146.62
  5. Step 5: Solve for x
    x = 113,146.62/424.82
  6. Step 6: Final answer
    x = 266.34

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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.