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Finding the Third Proportional to 388,217 and 823,090

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Solution

The third proportional to 388,217 and 823,090 is: 1,745,099.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,217 : 823,090 = 823,090 : x
  2. Step 2: Convert to fraction form
    388,217/823,090 = 823,090/x
  3. Step 3: Cross multiply
    388,217x = 823,090 × 823,090
  4. Step 4: Simplify right side
    388,217x = 677,477,148,100
  5. Step 5: Solve for x
    x = 677,477,148,100/388,217
  6. Step 6: Final answer
    x = 1,745,099.13

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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.