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Finding the Third Proportional to 411,226 and 645,239

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Solution

The third proportional to 411,226 and 645,239 is: 1,012,419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,226 : 645,239 = 645,239 : x
  2. Step 2: Convert to fraction form
    411,226/645,239 = 645,239/x
  3. Step 3: Cross multiply
    411,226x = 645,239 × 645,239
  4. Step 4: Simplify right side
    411,226x = 416,333,367,121
  5. Step 5: Solve for x
    x = 416,333,367,121/411,226
  6. Step 6: Final answer
    x = 1,012,419.85

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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.