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Finding the Third Proportional to 128,730 and 280,344

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Solution

The third proportional to 128,730 and 280,344 is: 610,524.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,730 : 280,344 = 280,344 : x
  2. Step 2: Convert to fraction form
    128,730/280,344 = 280,344/x
  3. Step 3: Cross multiply
    128,730x = 280,344 × 280,344
  4. Step 4: Simplify right side
    128,730x = 78,592,758,336
  5. Step 5: Solve for x
    x = 78,592,758,336/128,730
  6. Step 6: Final answer
    x = 610,524.03

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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.