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Finding the Third Proportional to 284.50 and 620.38

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Solution

The third proportional to 284.50 and 620.38 is: 1,352.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.50 : 620.38 = 620.38 : x
  2. Step 2: Convert to fraction form
    284.50/620.38 = 620.38/x
  3. Step 3: Cross multiply
    284.50x = 620.38 × 620.38
  4. Step 4: Simplify right side
    284.50x = 384,865.14
  5. Step 5: Solve for x
    x = 384,865.14/284.50
  6. Step 6: Final answer
    x = 1,352.78

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.