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Finding the Third Proportional to 401,913 and 545,809

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Solution

The third proportional to 401,913 and 545,809 is: 741,223.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,913 : 545,809 = 545,809 : x
  2. Step 2: Convert to fraction form
    401,913/545,809 = 545,809/x
  3. Step 3: Cross multiply
    401,913x = 545,809 × 545,809
  4. Step 4: Simplify right side
    401,913x = 297,907,464,481
  5. Step 5: Solve for x
    x = 297,907,464,481/401,913
  6. Step 6: Final answer
    x = 741,223.76

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.