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Finding the Third Proportional to 428.25 and 924.38

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Solution

The third proportional to 428.25 and 924.38 is: 1,995.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.25 : 924.38 = 924.38 : x
  2. Step 2: Convert to fraction form
    428.25/924.38 = 924.38/x
  3. Step 3: Cross multiply
    428.25x = 924.38 × 924.38
  4. Step 4: Simplify right side
    428.25x = 854,469.14
  5. Step 5: Solve for x
    x = 854,469.14/428.25
  6. Step 6: Final answer
    x = 1,995.26

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.