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Finding the Third Proportional to 172,400 and 257,562

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Solution

The third proportional to 172,400 and 257,562 is: 384,792.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,400 : 257,562 = 257,562 : x
  2. Step 2: Convert to fraction form
    172,400/257,562 = 257,562/x
  3. Step 3: Cross multiply
    172,400x = 257,562 × 257,562
  4. Step 4: Simplify right side
    172,400x = 66,338,183,844
  5. Step 5: Solve for x
    x = 66,338,183,844/172,400
  6. Step 6: Final answer
    x = 384,792.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.