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Finding the Third Proportional to 187,620 and 394,680

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Solution

The third proportional to 187,620 and 394,680 is: 830,254.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,620 : 394,680 = 394,680 : x
  2. Step 2: Convert to fraction form
    187,620/394,680 = 394,680/x
  3. Step 3: Cross multiply
    187,620x = 394,680 × 394,680
  4. Step 4: Simplify right side
    187,620x = 155,772,302,400
  5. Step 5: Solve for x
    x = 155,772,302,400/187,620
  6. Step 6: Final answer
    x = 830,254.25

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.