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Finding the Third Proportional to 201,878 and 313,468

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Solution

The third proportional to 201,878 and 313,468 is: 486,740.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,878 : 313,468 = 313,468 : x
  2. Step 2: Convert to fraction form
    201,878/313,468 = 313,468/x
  3. Step 3: Cross multiply
    201,878x = 313,468 × 313,468
  4. Step 4: Simplify right side
    201,878x = 98,262,187,024
  5. Step 5: Solve for x
    x = 98,262,187,024/201,878
  6. Step 6: Final answer
    x = 486,740.44

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.