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Finding the Third Proportional to 411,228 and 645,242

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Solution

The third proportional to 411,228 and 645,242 is: 1,012,424.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,228 : 645,242 = 645,242 : x
  2. Step 2: Convert to fraction form
    411,228/645,242 = 645,242/x
  3. Step 3: Cross multiply
    411,228x = 645,242 × 645,242
  4. Step 4: Simplify right side
    411,228x = 416,337,238,564
  5. Step 5: Solve for x
    x = 416,337,238,564/411,228
  6. Step 6: Final answer
    x = 1,012,424.35

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.