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Finding the Third Proportional to 389,698 and 528,099

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Solution

The third proportional to 389,698 and 528,099 is: 715,653.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,698 : 528,099 = 528,099 : x
  2. Step 2: Convert to fraction form
    389,698/528,099 = 528,099/x
  3. Step 3: Cross multiply
    389,698x = 528,099 × 528,099
  4. Step 4: Simplify right side
    389,698x = 278,888,553,801
  5. Step 5: Solve for x
    x = 278,888,553,801/389,698
  6. Step 6: Final answer
    x = 715,653.03

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.