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Finding the Third Proportional to 285.19 and 613.97

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Solution

The third proportional to 285.19 and 613.97 is: 1,321.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.19 : 613.97 = 613.97 : x
  2. Step 2: Convert to fraction form
    285.19/613.97 = 613.97/x
  3. Step 3: Cross multiply
    285.19x = 613.97 × 613.97
  4. Step 4: Simplify right side
    285.19x = 376,957.63
  5. Step 5: Solve for x
    x = 376,957.63/285.19
  6. Step 6: Final answer
    x = 1,321.79

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.