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Finding the Third Proportional to 763.88 and 1,679.63

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Solution

The third proportional to 763.88 and 1,679.63 is: 3,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.88 : 1,679.63 = 1,679.63 : x
  2. Step 2: Convert to fraction form
    763.88/1,679.63 = 1,679.63/x
  3. Step 3: Cross multiply
    763.88x = 1,679.63 × 1,679.63
  4. Step 4: Simplify right side
    763.88x = 2,821,140.14
  5. Step 5: Solve for x
    x = 2,821,140.14/763.88
  6. Step 6: Final answer
    x = 3,693.20

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.