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Finding the Third Proportional to 423,804.50 and 640,027

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Solution

The third proportional to 423,804.50 and 640,027 is: 966,564.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,804.50 : 640,027 = 640,027 : x
  2. Step 2: Convert to fraction form
    423,804.50/640,027 = 640,027/x
  3. Step 3: Cross multiply
    423,804.50x = 640,027 × 640,027
  4. Step 4: Simplify right side
    423,804.50x = 409,634,560,729
  5. Step 5: Solve for x
    x = 409,634,560,729/423,804.50
  6. Step 6: Final answer
    x = 966,564.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.