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Finding the Third Proportional to 784 and 1,745

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Solution

The third proportional to 784 and 1,745 is: 3,883.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    784 : 1,745 = 1,745 : x
  2. Step 2: Convert to fraction form
    784/1,745 = 1,745/x
  3. Step 3: Cross multiply
    784x = 1,745 × 1,745
  4. Step 4: Simplify right side
    784x = 3,045,025
  5. Step 5: Solve for x
    x = 3,045,025/784
  6. Step 6: Final answer
    x = 3,883.96

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.