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Finding the Third Proportional to 675.84 and 878.34

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Solution

The third proportional to 675.84 and 878.34 is: 1,141.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.84 : 878.34 = 878.34 : x
  2. Step 2: Convert to fraction form
    675.84/878.34 = 878.34/x
  3. Step 3: Cross multiply
    675.84x = 878.34 × 878.34
  4. Step 4: Simplify right side
    675.84x = 771,487.74
  5. Step 5: Solve for x
    x = 771,487.74/675.84
  6. Step 6: Final answer
    x = 1,141.52

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.