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Finding the Third Proportional to 259,380 and 389,070

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Solution

The third proportional to 259,380 and 389,070 is: 583,605

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,380 : 389,070 = 389,070 : x
  2. Step 2: Convert to fraction form
    259,380/389,070 = 389,070/x
  3. Step 3: Cross multiply
    259,380x = 389,070 × 389,070
  4. Step 4: Simplify right side
    259,380x = 151,375,464,900
  5. Step 5: Solve for x
    x = 151,375,464,900/259,380
  6. Step 6: Final answer
    x = 583,605

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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.