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Finding the Third Proportional to 345,954 and 518,931

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Solution

The third proportional to 345,954 and 518,931 is: 778,396.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,954 : 518,931 = 518,931 : x
  2. Step 2: Convert to fraction form
    345,954/518,931 = 518,931/x
  3. Step 3: Cross multiply
    345,954x = 518,931 × 518,931
  4. Step 4: Simplify right side
    345,954x = 269,289,382,761
  5. Step 5: Solve for x
    x = 269,289,382,761/345,954
  6. Step 6: Final answer
    x = 778,396.50

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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.