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Finding the Third Proportional to 609,721.50 and 905,739

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Solution

The third proportional to 609,721.50 and 905,739 is: 1,345,471.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,721.50 : 905,739 = 905,739 : x
  2. Step 2: Convert to fraction form
    609,721.50/905,739 = 905,739/x
  3. Step 3: Cross multiply
    609,721.50x = 905,739 × 905,739
  4. Step 4: Simplify right side
    609,721.50x = 820,363,136,121
  5. Step 5: Solve for x
    x = 820,363,136,121/609,721.50
  6. Step 6: Final answer
    x = 1,345,471.89

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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.