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Finding the Third Proportional to 421,474 and 912,932

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Solution

The third proportional to 421,474 and 912,932 is: 1,977,452.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,474 : 912,932 = 912,932 : x
  2. Step 2: Convert to fraction form
    421,474/912,932 = 912,932/x
  3. Step 3: Cross multiply
    421,474x = 912,932 × 912,932
  4. Step 4: Simplify right side
    421,474x = 833,444,836,624
  5. Step 5: Solve for x
    x = 833,444,836,624/421,474
  6. Step 6: Final answer
    x = 1,977,452.55

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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.