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Finding the Third Proportional to 693.50 and 1,490.25

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Solution

The third proportional to 693.50 and 1,490.25 is: 3,202.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.50 : 1,490.25 = 1,490.25 : x
  2. Step 2: Convert to fraction form
    693.50/1,490.25 = 1,490.25/x
  3. Step 3: Cross multiply
    693.50x = 1,490.25 × 1,490.25
  4. Step 4: Simplify right side
    693.50x = 2,220,845.06
  5. Step 5: Solve for x
    x = 2,220,845.06/693.50
  6. Step 6: Final answer
    x = 3,202.37

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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.