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Finding the Third Proportional to 616,905 and 920,217

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Solution

The third proportional to 616,905 and 920,217 is: 1,372,657.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,905 : 920,217 = 920,217 : x
  2. Step 2: Convert to fraction form
    616,905/920,217 = 920,217/x
  3. Step 3: Cross multiply
    616,905x = 920,217 × 920,217
  4. Step 4: Simplify right side
    616,905x = 846,799,327,089
  5. Step 5: Solve for x
    x = 846,799,327,089/616,905
  6. Step 6: Final answer
    x = 1,372,657.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.