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Finding the Third Proportional to 658.75 and 1,405.38

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Solution

The third proportional to 658.75 and 1,405.38 is: 2,998.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.75 : 1,405.38 = 1,405.38 : x
  2. Step 2: Convert to fraction form
    658.75/1,405.38 = 1,405.38/x
  3. Step 3: Cross multiply
    658.75x = 1,405.38 × 1,405.38
  4. Step 4: Simplify right side
    658.75x = 1,975,078.89
  5. Step 5: Solve for x
    x = 1,975,078.89/658.75
  6. Step 6: Final answer
    x = 2,998.22

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.