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Finding the Third Proportional to 255,632 and 395,412

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Solution

The third proportional to 255,632 and 395,412 is: 611,623.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,632 : 395,412 = 395,412 : x
  2. Step 2: Convert to fraction form
    255,632/395,412 = 395,412/x
  3. Step 3: Cross multiply
    255,632x = 395,412 × 395,412
  4. Step 4: Simplify right side
    255,632x = 156,350,649,744
  5. Step 5: Solve for x
    x = 156,350,649,744/255,632
  6. Step 6: Final answer
    x = 611,623.93

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.