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Finding the Third Proportional to 30,458 and 65,380

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Solution

The third proportional to 30,458 and 65,380 is: 140,342.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,458 : 65,380 = 65,380 : x
  2. Step 2: Convert to fraction form
    30,458/65,380 = 65,380/x
  3. Step 3: Cross multiply
    30,458x = 65,380 × 65,380
  4. Step 4: Simplify right side
    30,458x = 4,274,544,400
  5. Step 5: Solve for x
    x = 4,274,544,400/30,458
  6. Step 6: Final answer
    x = 140,342.25

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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.