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Finding the Third Proportional to 149,472 and 321,132

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Solution

The third proportional to 149,472 and 321,132 is: 689,933.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,472 : 321,132 = 321,132 : x
  2. Step 2: Convert to fraction form
    149,472/321,132 = 321,132/x
  3. Step 3: Cross multiply
    149,472x = 321,132 × 321,132
  4. Step 4: Simplify right side
    149,472x = 103,125,761,424
  5. Step 5: Solve for x
    x = 103,125,761,424/149,472
  6. Step 6: Final answer
    x = 689,933.64

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.