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Finding the Third Proportional to 301,812.75 and 639,603

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Solution

The third proportional to 301,812.75 and 639,603 is: 1,355,449.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    301,812.75 : 639,603 = 639,603 : x
  2. Step 2: Convert to fraction form
    301,812.75/639,603 = 639,603/x
  3. Step 3: Cross multiply
    301,812.75x = 639,603 × 639,603
  4. Step 4: Simplify right side
    301,812.75x = 409,091,997,609
  5. Step 5: Solve for x
    x = 409,091,997,609/301,812.75
  6. Step 6: Final answer
    x = 1,355,449.69

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.