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Finding the Third Proportional to 270,485 and 421,035

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Solution

The third proportional to 270,485 and 421,035 is: 655,380.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,485 : 421,035 = 421,035 : x
  2. Step 2: Convert to fraction form
    270,485/421,035 = 421,035/x
  3. Step 3: Cross multiply
    270,485x = 421,035 × 421,035
  4. Step 4: Simplify right side
    270,485x = 177,270,471,225
  5. Step 5: Solve for x
    x = 177,270,471,225/270,485
  6. Step 6: Final answer
    x = 655,380.04

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.