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Finding the Third Proportional to 403,876 and 627,120

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Solution

The third proportional to 403,876 and 627,120 is: 973,762.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,876 : 627,120 = 627,120 : x
  2. Step 2: Convert to fraction form
    403,876/627,120 = 627,120/x
  3. Step 3: Cross multiply
    403,876x = 627,120 × 627,120
  4. Step 4: Simplify right side
    403,876x = 393,279,494,400
  5. Step 5: Solve for x
    x = 393,279,494,400/403,876
  6. Step 6: Final answer
    x = 973,762.97

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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.