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Finding the Third Proportional to 280.69 and 633.94

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Solution

The third proportional to 280.69 and 633.94 is: 1,431.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.69 : 633.94 = 633.94 : x
  2. Step 2: Convert to fraction form
    280.69/633.94 = 633.94/x
  3. Step 3: Cross multiply
    280.69x = 633.94 × 633.94
  4. Step 4: Simplify right side
    280.69x = 401,876.75
  5. Step 5: Solve for x
    x = 401,876.75/280.69
  6. Step 6: Final answer
    x = 1,431.76

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Why These Related Problems?

These problems maintain the same ratio (2.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.