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Finding the Third Proportional to 420,307 and 912,059

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Solution

The third proportional to 420,307 and 912,059 is: 1,979,152.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,307 : 912,059 = 912,059 : x
  2. Step 2: Convert to fraction form
    420,307/912,059 = 912,059/x
  3. Step 3: Cross multiply
    420,307x = 912,059 × 912,059
  4. Step 4: Simplify right side
    420,307x = 831,851,619,481
  5. Step 5: Solve for x
    x = 831,851,619,481/420,307
  6. Step 6: Final answer
    x = 1,979,152.43

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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.