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Finding the Third Proportional to 180,936 and 392,490

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Solution

The third proportional to 180,936 and 392,490 is: 851,397.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,936 : 392,490 = 392,490 : x
  2. Step 2: Convert to fraction form
    180,936/392,490 = 392,490/x
  3. Step 3: Cross multiply
    180,936x = 392,490 × 392,490
  4. Step 4: Simplify right side
    180,936x = 154,048,400,100
  5. Step 5: Solve for x
    x = 154,048,400,100/180,936
  6. Step 6: Final answer
    x = 851,397.18

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.