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Finding the Third Proportional to 420,809 and 651,896

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Solution

The third proportional to 420,809 and 651,896 is: 1,009,884.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,809 : 651,896 = 651,896 : x
  2. Step 2: Convert to fraction form
    420,809/651,896 = 651,896/x
  3. Step 3: Cross multiply
    420,809x = 651,896 × 651,896
  4. Step 4: Simplify right side
    420,809x = 424,968,394,816
  5. Step 5: Solve for x
    x = 424,968,394,816/420,809
  6. Step 6: Final answer
    x = 1,009,884.28

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.