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Finding the Third Proportional to 133,128 and 289,580

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Solution

The third proportional to 133,128 and 289,580 is: 629,894.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,128 : 289,580 = 289,580 : x
  2. Step 2: Convert to fraction form
    133,128/289,580 = 289,580/x
  3. Step 3: Cross multiply
    133,128x = 289,580 × 289,580
  4. Step 4: Simplify right side
    133,128x = 83,856,576,400
  5. Step 5: Solve for x
    x = 83,856,576,400/133,128
  6. Step 6: Final answer
    x = 629,894.36

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.