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Finding the Third Proportional to 275,815.50 and 428,840.25

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Solution

The third proportional to 275,815.50 and 428,840.25 is: 666,764.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,815.50 : 428,840.25 = 428,840.25 : x
  2. Step 2: Convert to fraction form
    275,815.50/428,840.25 = 428,840.25/x
  3. Step 3: Cross multiply
    275,815.50x = 428,840.25 × 428,840.25
  4. Step 4: Simplify right side
    275,815.50x = 183,903,960,020.06
  5. Step 5: Solve for x
    x = 183,903,960,020.06/275,815.50
  6. Step 6: Final answer
    x = 666,764.41

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.