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Finding the Third Proportional to 1,720.50 and 4,539.75

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Solution

The third proportional to 1,720.50 and 4,539.75 is: 11,978.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.50 : 4,539.75 = 4,539.75 : x
  2. Step 2: Convert to fraction form
    1,720.50/4,539.75 = 4,539.75/x
  3. Step 3: Cross multiply
    1,720.50x = 4,539.75 × 4,539.75
  4. Step 4: Simplify right side
    1,720.50x = 20,609,330.06
  5. Step 5: Solve for x
    x = 20,609,330.06/1,720.50
  6. Step 6: Final answer
    x = 11,978.69

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Why These Related Problems?

These problems maintain the same ratio (2.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.