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Finding the Third Proportional to 421,166 and 631,541

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Solution

The third proportional to 421,166 and 631,541 is: 946,999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,166 : 631,541 = 631,541 : x
  2. Step 2: Convert to fraction form
    421,166/631,541 = 631,541/x
  3. Step 3: Cross multiply
    421,166x = 631,541 × 631,541
  4. Step 4: Simplify right side
    421,166x = 398,844,034,681
  5. Step 5: Solve for x
    x = 398,844,034,681/421,166
  6. Step 6: Final answer
    x = 946,999.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.