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Finding the Fourth Proportional to 424.50, 636.75 and 168

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Solution

The fourth proportional to 424.50, 636.75 and 168 is: 252

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.50 : 636.75 = 168 : x
  2. Step 2: Convert to fraction form
    424.50/636.75 = 168/x
  3. Step 3: Cross multiply
    424.50x = 636.75 × 168
  4. Step 4: Simplify right side
    424.50x = 106,974
  5. Step 5: Solve for x
    x = 106,974/424.50
  6. Step 6: Final answer
    x = 252

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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.