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Finding the Third Proportional to 128,160 and 275,292

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Solution

The third proportional to 128,160 and 275,292 is: 591,336.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,160 : 275,292 = 275,292 : x
  2. Step 2: Convert to fraction form
    128,160/275,292 = 275,292/x
  3. Step 3: Cross multiply
    128,160x = 275,292 × 275,292
  4. Step 4: Simplify right side
    128,160x = 75,785,685,264
  5. Step 5: Solve for x
    x = 75,785,685,264/128,160
  6. Step 6: Final answer
    x = 591,336.50

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.