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Finding the Third Proportional to 128,664.75 and 283,506

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Solution

The third proportional to 128,664.75 and 283,506 is: 624,690.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,664.75 : 283,506 = 283,506 : x
  2. Step 2: Convert to fraction form
    128,664.75/283,506 = 283,506/x
  3. Step 3: Cross multiply
    128,664.75x = 283,506 × 283,506
  4. Step 4: Simplify right side
    128,664.75x = 80,375,652,036
  5. Step 5: Solve for x
    x = 80,375,652,036/128,664.75
  6. Step 6: Final answer
    x = 624,690.54

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.