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Finding the Third Proportional to 325,139 and 431,535

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Solution

The third proportional to 325,139 and 431,535 is: 572,747.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,139 : 431,535 = 431,535 : x
  2. Step 2: Convert to fraction form
    325,139/431,535 = 431,535/x
  3. Step 3: Cross multiply
    325,139x = 431,535 × 431,535
  4. Step 4: Simplify right side
    325,139x = 186,222,456,225
  5. Step 5: Solve for x
    x = 186,222,456,225/325,139
  6. Step 6: Final answer
    x = 572,747.21

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.