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Finding the Third Proportional to 1,128 and 1,749.75

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Solution

The third proportional to 1,128 and 1,749.75 is: 2,714.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128 : 1,749.75 = 1,749.75 : x
  2. Step 2: Convert to fraction form
    1,128/1,749.75 = 1,749.75/x
  3. Step 3: Cross multiply
    1,128x = 1,749.75 × 1,749.75
  4. Step 4: Simplify right side
    1,128x = 3,061,625.06
  5. Step 5: Solve for x
    x = 3,061,625.06/1,128
  6. Step 6: Final answer
    x = 2,714.21

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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.