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Finding the Third Proportional to 286,686 and 430,137

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Solution

The third proportional to 286,686 and 430,137 is: 645,367.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,686 : 430,137 = 430,137 : x
  2. Step 2: Convert to fraction form
    286,686/430,137 = 430,137/x
  3. Step 3: Cross multiply
    286,686x = 430,137 × 430,137
  4. Step 4: Simplify right side
    286,686x = 185,017,838,769
  5. Step 5: Solve for x
    x = 185,017,838,769/286,686
  6. Step 6: Final answer
    x = 645,367.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.