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Finding the Third Proportional to 406,740 and 618,403

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Solution

The third proportional to 406,740 and 618,403 is: 940,213.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,740 : 618,403 = 618,403 : x
  2. Step 2: Convert to fraction form
    406,740/618,403 = 618,403/x
  3. Step 3: Cross multiply
    406,740x = 618,403 × 618,403
  4. Step 4: Simplify right side
    406,740x = 382,422,270,409
  5. Step 5: Solve for x
    x = 382,422,270,409/406,740
  6. Step 6: Final answer
    x = 940,213.09

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.