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Finding the Third Proportional to 771.61 and 1,645.73

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Solution

The third proportional to 771.61 and 1,645.73 is: 3,510.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.61 : 1,645.73 = 1,645.73 : x
  2. Step 2: Convert to fraction form
    771.61/1,645.73 = 1,645.73/x
  3. Step 3: Cross multiply
    771.61x = 1,645.73 × 1,645.73
  4. Step 4: Simplify right side
    771.61x = 2,708,441.63
  5. Step 5: Solve for x
    x = 2,708,441.63/771.61
  6. Step 6: Final answer
    x = 3,510.12

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.