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Finding the Third Proportional to 1,960.88 and 3,128.63

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Solution

The third proportional to 1,960.88 and 3,128.63 is: 4,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.88 : 3,128.63 = 3,128.63 : x
  2. Step 2: Convert to fraction form
    1,960.88/3,128.63 = 3,128.63/x
  3. Step 3: Cross multiply
    1,960.88x = 3,128.63 × 3,128.63
  4. Step 4: Simplify right side
    1,960.88x = 9,788,294.39
  5. Step 5: Solve for x
    x = 9,788,294.39/1,960.88
  6. Step 6: Final answer
    x = 4,991.80

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.