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Finding the Third Proportional to 420,674 and 912,325

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Solution

The third proportional to 420,674 and 912,325 is: 1,978,579.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,674 : 912,325 = 912,325 : x
  2. Step 2: Convert to fraction form
    420,674/912,325 = 912,325/x
  3. Step 3: Cross multiply
    420,674x = 912,325 × 912,325
  4. Step 4: Simplify right side
    420,674x = 832,336,905,625
  5. Step 5: Solve for x
    x = 832,336,905,625/420,674
  6. Step 6: Final answer
    x = 1,978,579.39

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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.