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Finding the Third Proportional to 289,488 and 628,485

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Solution

The third proportional to 289,488 and 628,485 is: 1,364,455.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,488 : 628,485 = 628,485 : x
  2. Step 2: Convert to fraction form
    289,488/628,485 = 628,485/x
  3. Step 3: Cross multiply
    289,488x = 628,485 × 628,485
  4. Step 4: Simplify right side
    289,488x = 394,993,395,225
  5. Step 5: Solve for x
    x = 394,993,395,225/289,488
  6. Step 6: Final answer
    x = 1,364,455.16

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.