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Finding the Third Proportional to 420,344 and 912,124

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Solution

The third proportional to 420,344 and 912,124 is: 1,979,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,344 : 912,124 = 912,124 : x
  2. Step 2: Convert to fraction form
    420,344/912,124 = 912,124/x
  3. Step 3: Cross multiply
    420,344x = 912,124 × 912,124
  4. Step 4: Simplify right side
    420,344x = 831,970,191,376
  5. Step 5: Solve for x
    x = 831,970,191,376/420,344
  6. Step 6: Final answer
    x = 1,979,260.30

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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.