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Finding the Fourth Proportional to 662.63, 993.87 and 272.39

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Solution

The fourth proportional to 662.63, 993.87 and 272.39 is: 408.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.63 : 993.87 = 272.39 : x
  2. Step 2: Convert to fraction form
    662.63/993.87 = 272.39/x
  3. Step 3: Cross multiply
    662.63x = 993.87 × 272.39
  4. Step 4: Simplify right side
    662.63x = 270,718.08
  5. Step 5: Solve for x
    x = 270,718.08/662.63
  6. Step 6: Final answer
    x = 408.55

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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.