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Finding the Third Proportional to 190,943 and 420,007

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Solution

The third proportional to 190,943 and 420,007 is: 923,866.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,943 : 420,007 = 420,007 : x
  2. Step 2: Convert to fraction form
    190,943/420,007 = 420,007/x
  3. Step 3: Cross multiply
    190,943x = 420,007 × 420,007
  4. Step 4: Simplify right side
    190,943x = 176,405,880,049
  5. Step 5: Solve for x
    x = 176,405,880,049/190,943
  6. Step 6: Final answer
    x = 923,866.70

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.