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Finding the Third Proportional to 999 and 1,770

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Solution

The third proportional to 999 and 1,770 is: 3,136.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    999 : 1,770 = 1,770 : x
  2. Step 2: Convert to fraction form
    999/1,770 = 1,770/x
  3. Step 3: Cross multiply
    999x = 1,770 × 1,770
  4. Step 4: Simplify right side
    999x = 3,132,900
  5. Step 5: Solve for x
    x = 3,132,900/999
  6. Step 6: Final answer
    x = 3,136.04

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Why These Related Problems?

These problems maintain the same ratio (1.77) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.