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Finding the Third Proportional to 393,909 and 573,640

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Solution

The third proportional to 393,909 and 573,640 is: 835,377.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,909 : 573,640 = 573,640 : x
  2. Step 2: Convert to fraction form
    393,909/573,640 = 573,640/x
  3. Step 3: Cross multiply
    393,909x = 573,640 × 573,640
  4. Step 4: Simplify right side
    393,909x = 329,062,849,600
  5. Step 5: Solve for x
    x = 329,062,849,600/393,909
  6. Step 6: Final answer
    x = 835,377.84

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.