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Finding the Third Proportional to 259,742 and 389,620

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Solution

The third proportional to 259,742 and 389,620 is: 584,440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,742 : 389,620 = 389,620 : x
  2. Step 2: Convert to fraction form
    259,742/389,620 = 389,620/x
  3. Step 3: Cross multiply
    259,742x = 389,620 × 389,620
  4. Step 4: Simplify right side
    259,742x = 151,803,744,400
  5. Step 5: Solve for x
    x = 151,803,744,400/259,742
  6. Step 6: Final answer
    x = 584,440.50

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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.