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Finding the Third Proportional to 691.50 and 1,674

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Solution

The third proportional to 691.50 and 1,674 is: 4,052.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.50 : 1,674 = 1,674 : x
  2. Step 2: Convert to fraction form
    691.50/1,674 = 1,674/x
  3. Step 3: Cross multiply
    691.50x = 1,674 × 1,674
  4. Step 4: Simplify right side
    691.50x = 2,802,276
  5. Step 5: Solve for x
    x = 2,802,276/691.50
  6. Step 6: Final answer
    x = 4,052.46

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.