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Finding the Third Proportional to 756 and 1,779.75

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Solution

The third proportional to 756 and 1,779.75 is: 4,189.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    756 : 1,779.75 = 1,779.75 : x
  2. Step 2: Convert to fraction form
    756/1,779.75 = 1,779.75/x
  3. Step 3: Cross multiply
    756x = 1,779.75 × 1,779.75
  4. Step 4: Simplify right side
    756x = 3,167,510.06
  5. Step 5: Solve for x
    x = 3,167,510.06/756
  6. Step 6: Final answer
    x = 4,189.83

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.