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Finding the Third Proportional to 401,613 and 621,855

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Solution

The third proportional to 401,613 and 621,855 is: 962,876.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,613 : 621,855 = 621,855 : x
  2. Step 2: Convert to fraction form
    401,613/621,855 = 621,855/x
  3. Step 3: Cross multiply
    401,613x = 621,855 × 621,855
  4. Step 4: Simplify right side
    401,613x = 386,703,641,025
  5. Step 5: Solve for x
    x = 386,703,641,025/401,613
  6. Step 6: Final answer
    x = 962,876.30

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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.